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All questions of September Week 2 for UPSC CSE Exam

Find the missing number.
17, 19, 23, 29, 31, 37, _____
  • a)
    47 
  • b)
    43 
  • c)
    40 
  • d)
    41
Correct answer is option 'D'. Can you explain this answer?

Shruti Dey answered
The given numbers are consecutive prime numbers in increasing order starting with 17.
Hence, the next number in the series is 41.

0, 4, 18, 48, ___, 180
  • a)
    58
  • b)
    144
  • c)
    84
  • d)
    100
Correct answer is option 'D'. Can you explain this answer?

Lavanya Menon answered
1st term = 5
2nd term = 5 × 2 + 3 = 13
3rd term = 13 × 3 + 2 = 41
4th term = 41 × 2 + 3 = 85 
5th term = 85 × 3 + 2 =257...
⇒ For every term at even position, the previous term is multiplied by 2 and 3 is added.
⇒ For every term at odd position, the previous term is multiplied by 3 and 2 is added.
So the missing term is: 257 × 2 + 3 = 517

17, __, 65, 113, 129, 161, 209.
  • a)
    34
  • b)
    33
  • c)
    40 
  • d)
    44
Correct answer is option 'B'. Can you explain this answer?

Shalini Patel answered
1st term = 8
2nd term = 8 x 2 = 16
3rd term = 16 x 3 = 48
4th term = 48 x 2 = 96
5th term = 96 x 3 = 288
6th term = 288 x 2 = 576...
⇒ For every term at even position, the previous term is multiplied by 2.
⇒ For every term at odd position, the previous term is multiplied by 3.
So the missing term is: 576 × 3 = 1728

12000, 2395, 474, 89.8, ___.
  • a)
    17.96
  • b)
    12.96
  • c)
    22.96 
  • d)
    none of these
Correct answer is option 'B'. Can you explain this answer?

Vikas Kapoor answered
The given numbers are squares of consecutive natural numbers in decreasing order starting with 15,
i.e., the numbers 225, 196, 169, ____, 100, 81 can be written as 152, 142, 132 , ____, 112 , 102 , 92.
Hence, the missing number is 122 = 144.

Consider the following statements.
1. The principle of collective responsibility means that the cabinet decisions bind all cabinet ministers not other ministers even if they differed in the Cabinet meeting.
2. If any Minister disagrees with the cabinet decision and is not prepared to defend it, he must resign 
Which of these statements is/are correct?
  • a)
    1 Only
  • b)
    2 only
  • c)
    Both of them   
  • d)
    None of them
Correct answer is option 'B'. Can you explain this answer?

Ojasvi Mehta answered
The principle of collective responsibility means that the cabinet decisions bind all cabinet ministers not other ministers even if they differed in the Cabinet meeting. The first statement is incorrect because the principle of collective responsibility binds all ministers who are part of the cabinet, not just the cabinet ministers.
If any Minister disagrees with the cabinet decision and is not prepared to defend it, he must resign: This statement is accurate. Under the principle of collective responsibility, if a minister cannot support a cabinet decision publicly, the convention is that the minister should resign from the cabinet. This ensures that the government presents a united front and maintains coherence in its policies and actions.

Consider the following statements. 
1. The events of 1857 demonstrated that the people in India's politics were not basically communal or sectarian before 1858. 
2. Rani Lakshmibai had the solid support of Afghan soldiers. 
3. There was deep loyalty which the people felt for the Mughal crown. 
4. During the entire revolt, there was complete cooperation between Hindus and Muslims at all levels. 
Which of these statements is/are correct?
  • a)
    1 and 2 only
  • b)
    2 and 3 Only
  • c)
    1, 3 and 4 only
  • d)
    All of them
Correct answer is option 'D'. Can you explain this answer?

Sarthak Goyal answered
  • During the entire revolt, there was complete cooperation between Hindus and Muslims at all levels-people, soldiers, leaders. 
  • All rebels acknowledged Bahadur Shah Zafar, a Muslim, as the emperor and the first impulse of the Hindu sepoys at Meerut was to march to Delhi, the Mughal imperial capital.
  • According to Maulana Azad, "Two facts stand out clearly in the midst of the tangled story of the Rising of 1857. 
  • The first is the remarkable sense of unity among the Hindus and the Muslims of India in this period. The other is the deep loyalty which the people felt for the Mughal Crown." 
  • Rebels and sepoys, both Hindu and Muslim, respected each other's sentiments. Immediate banning of cow slaughter was ordered once the revolt was successful in a particular area. 
  • Both Hindus and Muslims were well represented in leadership; for instance, Nana Saheb had Azimullah, a Muslim and an expert in political propaganda, as an aide. In contrast, Laxmibai had the solid support of Afghan soldiers. 
  • The events of 1857 demonstrated India's people and politics was not basically communal or sectarian before 1858.

100, 70, 46, 28, __, 10
  • a)
    17
  • b)
    15
  • c)
    20
  • d)
    16
Correct answer is option 'D'. Can you explain this answer?

Vivek Patel answered
1st term = 75
2nd term = 75 + 216 = 75 + 63 = 291
3rd term = 291 + 125 = 291 + 53 = 416
4th term = 416 + 64 = 416 + 43 = 480
5th term = 480 + 27 = 480 + 33 = 507...
The differences are cubes of consecutive natural numbers in decreasing order from 6.
So, the missing term = 507 + 8 = 507 + 23 = 515

1, 8, 28, 99, 412, 2075, ____.
  • a)
    12450 
  • b)
    12462
  • c)
    10387
  • d)
    10375
Correct answer is option 'B'. Can you explain this answer?

Lavanya Menon answered
The 1st to 5th terms are 0, 5, 22, 57, 116.
These terms are 1 – 1, 8 – 3, 27 – 5, 64 – 7, 125 – 9.
i.e. 13 – 1, 23 – 3, 33 – 5, 43 – 7, 53 – 9
So, the nth term of the series: n3 – (2n – 1).
So, the 6th term of the series is 63 – (2 × 6 –1) = 216 – 11 = 205.

Which statement is not correct in the context of Article 75(3)?
  • a)
    The President will appoint the Prime Minister
  • b)
    The number of members of cabinet will not exceed 15% of the total number of Lok Sabha
  • c)
    The minister shall hold the office till the pleasure of the Prime Minister 
  • d)
    The Council of Ministers shall be collectively responsible to Lok Sabha.
Correct answer is option 'C'. Can you explain this answer?

Alok Verma answered
The minister shall hold the office till the pleasure of the Prime Minister.  Option 3 is incorrect.
Article 75(2) specifically provides that the ministers shall hold office during the pleasure of the President.. The Prime Minister may call for the resignation of any ministers at any time.

Which of the following is a part of the Eastern Coast?
  • a)
    Coromandel coast
  • b)
    Konkan coast
  • c)
    Malabar coast
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?

Explanation:

The Eastern Coast of India stretches from Tamil Nadu in the south to West Bengal in the north. It is characterized by a long coastline, dotted with numerous natural harbors and lagoons. The Eastern Coast is divided into several regions, each with its distinct geographical features, culture, and history.

Coromandel Coast:
The Coromandel Coast is a stretch of coastline that runs along the Bay of Bengal from the Krishna River Delta in Andhra Pradesh to the Cauvery River Delta in Tamil Nadu. It is named after the Coromandel tree, which is native to the region. The Coromandel Coast is known for its rich cultural heritage, with several ancient temples, monuments, and forts dotting the coastline. It is also famous for its beautiful beaches, fishing villages, and vibrant local markets.

Other Coasts:
The Konkan Coast is a stretch of coastline that runs along the Arabian Sea from the Mumbai Metropolitan Region in Maharashtra to the Goa-Karnataka border. It is characterized by its rocky terrain, lush greenery, and pristine beaches. The Malabar Coast is a stretch of coastline that runs along the Arabian Sea from Goa in the north to Kanyakumari in the south. It is known for its rich biodiversity, with several wildlife sanctuaries and national parks located along the coastline.

Conclusion:
In conclusion, the Coromandel Coast is a part of the Eastern Coast of India, which stretches from Tamil Nadu in the south to West Bengal in the north. It is known for its rich cultural heritage and beautiful beaches, and is one of the most popular tourist destinations in the country.

7, 9, 13, 21, 37, ____
  • a)
    58
  • b)
    63
  • c)
    69
  • d)
    72
Correct answer is option 'C'. Can you explain this answer?

Lavanya Menon answered
The common difference between consecutive terms is 6, 12, 6, 12 & so on. So, the term next to 141 is 141 + 6 = 147

1, 2, 8, 33, 148, __.
  • a)
    265
  • b)
    465
  • c)
    565
  • d)
    765
Correct answer is option 'D'. Can you explain this answer?

Ankit Saini answered
1*1 + (1)2 = 1+1 = 2
2*2 + (2)2 = 4+4 = 8
8*3 + (3)2 = 24+9 = 33
33*4 + (4)2 = 132+16 = 148
148*5 + (5)2 =740+25 = 765

Consider the following statements.
1. A person who is not a member of either House of Parliament can also be appointed as a minister 
2. But within six months, he must become a member, by election or nomination, of either House of Parliament, otherwise, he ceases to be a minister
Which of these statements is/are correct?
  • a)
    Both 1 and 2
  • b)
    2 Only
  • c)
    1 Only
  • d)
    None of them
Correct answer is option 'A'. Can you explain this answer?

Mehul Malik answered
Both statements are correct.
A person who is not a member of either House of Parliament can be appointed as a minister under Article 75(5) of the Constitution of India. This is because the Constitution does not specifically require that a person must be a member of Parliament to be appointed as a minister.
However, as per Article 75(5), such a person must become a member of either House of Parliament within six months of their appointment as a minister. If they fail to do so, they would cease to be a minister. This provision ensures that all ministers are accountable to the Parliament and responsible for their actions as ministers.

Consider the following pairs:
1. Sir John Seeley: "Planned war of national independence"
2. Dr. K. Datta: Marxist historian
3. M.N. Roy: Commercial capitalism
4. S.B. Chaudhuri: Feudalism
How many pairs given above are correctly matched?
  • a)
    Only one pair
  • b)
    Only two pairs
  • c)
    Only three pairs
  • d)
    All four pairs
Correct answer is option 'A'. Can you explain this answer?

K.L Institute answered
1. Sir John Seeley: "Planned war of national independence" - Incorrect. Sir John Seeley did not describe the Revolt of 1857 as a "planned war of national independence." He viewed it more as a series of uncoordinated uprisings.
2. Dr. K. Datta: Marxist historian - Incorrect. Dr. K. Datta is not identified as a Marxist historian. Marxist historians, such as R.P. Dutt, typically analyzed the Revolt of 1857 from a class struggle perspective.
3. M.N. Roy: Commercial capitalism - Correct. M.N. Roy viewed the Revolt of 1857 within the broader context of commercial capitalism and its impacts.
4. S.B. Chaudhuri: Feudalism - Incorrect. S.B. Chaudhuri is known for his work on the economic history of India, but he did not specifically focus on feudalism in the context of the Revolt of 1857.
Thus, only one pair is correctly matched.

The resistant to the revolt in Banaras was put by 
  • a)
    Henry Lawrence
  • b)
    Sir Colin Campbell
  • c)
    Sir Hugh rose
  • d)
    Colonel James Neill
Correct answer is option 'D'. Can you explain this answer?

Kabir Verma answered
The British Resistance: 
Delhi - Lieutenant Willoughby, John Nicholson, Lieutenant Hudson 
Kanpur - Sir Hugh Wheeler, Sir Colin Campbell 
Lucknow - Henry Lawrence, Brigadier Inglis, Henry Havelock, James Outram, Sir Colin Campbell 
Jhansi - Sir Hugh Rose 
Benaras - Colonel James Neill

Consider the following statements
1. The UN General Assembly declared 2014 the International Year of Soils (IYS)
2. The IYS 2015 aims to increase awareness and understanding of the importance of soil for food security and essential ecosystem functions.
Which of the statements given above is/are are correct?
  • a)
        1 only
  • b)
        2 only
  • c)
        1 and 2
  • d)
        None
Correct answer is option 'B'. Can you explain this answer?

The correct answer is option 'B': Statement 2 only.

Explanation:
1. The UN General Assembly declared 2014 the International Year of Soils (IYS): This statement is incorrect. The UN General Assembly did not declare 2014 as the International Year of Soils. However, it did declare 2015 as the International Year of Soils.

2. The IYS 2015 aims to increase awareness and understanding of the importance of soil for food security and essential ecosystem functions: This statement is correct. The International Year of Soils (IYS) 2015 was indeed declared by the UN General Assembly with the aim of increasing awareness and understanding of the importance of soil for food security and essential ecosystem functions.

Further Explanation:

The International Year of Soils (IYS) is a global initiative aimed at raising awareness about the importance of soils for food security, climate change adaptation and mitigation, sustainable agriculture, and the preservation of ecosystems. It was declared by the UN General Assembly in 2013 and officially took place in 2015. The IYS was organized by the Food and Agriculture Organization of the United Nations (FAO) in collaboration with various stakeholders, including governments, NGOs, research institutions, and civil society organizations.

The main objective of the IYS 2015 was to increase awareness and understanding of the importance of soils for food security and essential ecosystem functions. It aimed to promote sustainable soil management practices and raise public awareness about the threats and challenges facing soil resources. The IYS also aimed to highlight the role of soil in providing ecosystem services, such as water filtration, nutrient cycling, carbon sequestration, and habitat for biodiversity.

Throughout the year, various activities and events were organized globally to celebrate the IYS. These included conferences, workshops, exhibitions, educational campaigns, and public outreach programs. The IYS also provided an opportunity for countries to share knowledge, best practices, and innovative approaches for sustainable soil management.

In conclusion, the correct answer is option 'B': Statement 2 only. Statement 1 is incorrect as the UN General Assembly did not declare 2014 as the International Year of Soils. However, statement 2 is correct as the IYS 2015 aimed to increase awareness and understanding of the importance of soil for food security and essential ecosystem functions.

Consider the following statements. 
1. Article 74 deals with the appointment and tenure of the council of ministers 
2. Article 72 deals with the responsibility, qualification, oath and salaries and allowances of the ministers 
Which of these statements is/are correct?
  • a)
    1 Only
  • b)
    2 Only
  • c)
    Both 1 and 2
  • d)
    None of them
Correct answer is option 'D'. Can you explain this answer?

Article 74 deals with the status of the council of ministers while Article 75 deals with the appointment, tenure, responsibility, qualification, oath and salaries and allowances of the ministers. The principles of the parliamentary system of government are not detailed in the Constitution, but two Articles (74 and 75) deal with them in a broad, sketchy and general manner.

Which among the following are the roles of the cabinet?
1. It is the chief policy formulating body of the central government 
2. It deals with all the major legislative matters
3. It deals with all foreign policies and Foreign Affairs
Choose from the following options.
  • a)
    1 and 3 Only
  • b)
    2 and 3 Only
  • c)
    1 and 2 Only
  • d)
    All of them
Correct answer is option 'D'. Can you explain this answer?

Gowri Mehta answered
The correct answer is option 'D': All of them.

The cabinet plays multiple roles in the functioning of the government. Let's discuss each role in detail:

1. Chief Policy Formulating Body of the Central Government:
The cabinet is responsible for formulating and implementing policies that guide the functioning of the central government. It is the highest decision-making body where policies are discussed, debated, and approved. The cabinet members, who are senior ministers, provide inputs, suggestions, and recommendations on various policy matters. They also analyze the potential impact of policies on different sectors and sections of society. Once a policy is finalized, it is implemented through various government departments and agencies.

2. Dealing with Major Legislative Matters:
The cabinet plays a crucial role in the legislative process. It is responsible for proposing and introducing major bills and legislations in the parliament. Cabinet members, who are also members of parliament, take part in the legislative debates, discussions, and voting. They present the government's perspective on various bills and work towards their passage. The cabinet also reviews and approves the draft bills prepared by different ministries before they are presented in the parliament.

3. Handling Foreign Policies and Foreign Affairs:
The cabinet is responsible for formulating and implementing foreign policies of the country. It deals with matters related to international relations, diplomacy, and foreign affairs. Cabinet members, including the Prime Minister and the Minister of External Affairs, represent the country in international forums, negotiations, and summits. They engage in bilateral and multilateral discussions with other countries to promote the country's interests, maintain peace and security, and enhance economic cooperation. The cabinet also takes decisions on matters like signing international treaties, agreements, and conventions.

In summary, the cabinet plays a pivotal role in policy formulation, legislative matters, and foreign affairs. It serves as the chief decision-making body of the central government, ensuring effective governance and representing the country's interests at the national and international levels.

Methane (CH4) is one of the six greenhouse gases under the Kyoto protocol. Which of the following is/are sources of methane?
1. Combustion of fossil fuels
2. Wetlands
3. Automobiles
Select the correct answer using the codes given below.
  • a)
    1 and 2 only
  • b)
    1 and 3 only
  • c)
    2 and 3 only
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?

Kalyan Verma answered
Ans: d
Explanation: All three are sources of methane. Natural gas and petroleum systems are one of the largest source of CH4 emissions. Methane is the primary component of natural gas. Some CH4 is emitted to the atmosphere during the production, processing, storage, transmission, and distribution of natural gas. Methane emissions from passenger cars (automobiles) have however dropped, as the use of catalytic converters increased. Methane is generated in landfills as waste decomposes and in the treatment of wastewater. As one of the most significant natural sources of atmospheric methane, wetlands remain a major area of concern with respect to climate change. 
 

 Before a Minister enters upon his office, the president administers to him the oaths of office and secrecy. In his oath of office, the minister swears:
1. To bear true faith and allegiance to the Constitution of India,
2. To uphold the sovereignty and integrity of India,
3. To faithfully and conscientiously discharge the duties of his office, and
4. To preserve, protect and defend the constitution and the law
Choose from the following options.
  • a)
    1, 2 and 3 Only
  • b)
    1 and 3 Only
  • c)
    1, 3 and 4 only
  • d)
    All of them
Correct answer is option 'A'. Can you explain this answer?

Amit Kumar answered
Before a Minister enters upon his office, the president administers to him the oaths of office and secrecy. In his oath of office, the minister swears: 1. to bear true faith and allegiance to the Constitution of India, 2. to uphold the sovereignty and integrity of India, 3. to faithfully and conscientiously discharge the duties of his office, and 4. to do right to all manner of people in accordance with the Constitution and the law, without fear or favour, affection or ill will.

Which of the following statement about the Council of ministers is NOT correct?
  1. It is a smaller body consisting of 15 to 20 ministers.
  2. It includes all the three categories of ministers, that is, cabinet ministers, ministers of state, and deputy ministers.
  • a)
    Only 1 is incorrect
  • b)
    Only 2 is incorrect
  • c)
    Both are incorrect
  • d)
    Both are correct
Correct answer is option 'A'. Can you explain this answer?

Garima Desai answered
Understanding the Council of Ministers
The Council of Ministers is a pivotal component of the executive branch in India, responsible for the administration and governance of the country. Let's analyze the statements provided.
Statement Analysis
- Statement 1: It is a smaller body consisting of 15 to 20 ministers.
- This statement is incorrect. In India, the Council of Ministers can consist of more than 20 ministers, depending on the size of the government. There is no fixed upper limit of 20 ministers, making this statement misleading.
- Statement 2: It includes all three categories of ministers: cabinet ministers, ministers of state, and deputy ministers.
- This statement is correct. The Council of Ministers indeed comprises all three categories of ministers. Cabinet ministers hold significant portfolios, while ministers of state may hold independent charge or assist cabinet ministers. Deputy ministers typically assist cabinet or state ministers.
Conclusion
Given the analysis, only the first statement is incorrect, which means the correct answer is option 'A'.
- Option A: Only 1 is incorrect.
This highlights the importance of understanding the structure and composition of the Council of Ministers in the context of Indian governance, especially for competitive examinations like UPSC.

What does the high Biological Oxygen Demand (BOD) indicates?
  • a)
        High level of Microbial Pollution 
  • b)
        Low level of Microbial Pollution 
  • c)
        Absence of Microbial Pollution
  • d)
        Water is fully pure
Correct answer is option 'A'. Can you explain this answer?

Swati Das answered
Ans: a
Explanation: Oxygen is demanded for decomposition related activities under the water. Increase in waste and pollution enhances the decomposition activities and thereby reduces the availability of oxygen for other organic activities under the water body.
 

Which of the following statements is/are correct regarding the Central Council of Ministers?
1. It consists of three categories of ministers.
2. At times, the council of ministers may also include a deputy prime minister.
Select the correct answer code from the following options.
  • a)
    1 Only
  • b)
    2 Only
  • c)
    Both 1 and 2
  • d)
    None of them
Correct answer is option 'C'. Can you explain this answer?

Nabanita Kaur answered
Central Council of Ministers consists of three categories of ministers, namely, cabinet ministers, ministers of state and deputy ministers. At times, the council of ministers may also include a deputy prime minister. The deputy prime ministers are appointed mostly for political reasons.

Consider the following statements:
Statement-I:
The revolt of 1857 coincided with certain outside events in which the British suffered serious losses - the First Afghan War (1838-42), Punjab Wars (1845-49), and the Crimean Wars (1854-56).
Statement-II:
The immediate cause of the sepoys' dissatisfaction during the revolt of 1857 was the order that they would not be given the foreign service allowance (Bhatta) when serving in Sindh or in Punjab.
Which one of the following is correct in respect of the above statements?
  • a)
     
    Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
  • b)
     
    Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
  • c)
    Statement-I is correct, but Statement-II is incorrect
  • d)
    Statement-I is incorrect, but Statement-II is correct
Correct answer is option 'B'. Can you explain this answer?

The correct answer is:
b) Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
  • Statement-I is correct because the British did face significant challenges and losses in the First Afghan War, Punjab Wars, and Crimean Wars around the time of the 1857 revolt. These conflicts impacted the British resources and focus.
  • Statement-II is also correct, as the issue of foreign service allowance (Bhatta) was a point of contention and dissatisfaction among the sepoys, contributing to their grievances.
However, Statement-II does not explain Statement-I, as the dissatisfaction over Bhatta is not directly related to the British losses in the wars mentioned in Statement-I.

What is the meaning of coral bleaching?
  • a)
        Paling of coral color or decline in zooxanthellae due to climate change 
  • b)
        Impacts of excessive sea  trade on fishing industry
  • c)
        Both a and b
  • d)
        None of the above
Correct answer is option 'A'. Can you explain this answer?

Ans: a
Explanation: Coral Bleaching is being caused by the climate change. Increase in surface temperature of ocean due to climate change is increasing the decline of zooxanthellae. Zooxanthellae is responsible for photosynthesis. 
 

Consider the following statements:
Statement I: India’s offshore and deep-sea fish catch is very poor considering the marine potential.
Statement II: Indian coast does not have many gulfs, bays, estuaries and backwaters.
Code :
  • a)
    Statement I is true but Statement II is false
  • b)
    Both the statements are individually true but Statement II is not the correct explanation of Statement I
  • c)
    Both the statements are individually true and Statement II is the correct explanation of Statement I
  • d)
    Statement I is false but Statement II is true
Correct answer is option 'A'. Can you explain this answer?

Ojasvi Mehta answered
Let's analyze the given statements to determine their correctness and relationship:
Statement I: India’s offshore and deep-sea fish catch is very poor considering the marine potential.
- This statement is true. India has significant marine potential, but the offshore and deep-sea fish catch is not as high as it could be. Factors such as inadequate infrastructure, technology, and investment contribute to this.
Statement II: Indian coast does not have many gulfs, bays, estuaries and backwaters.
- This statement is false. The Indian coastline is quite diverse and features many gulfs, bays, estuaries, and backwaters. Examples include the Gulf of Kutch, Gulf of Khambhat, Bay of Bengal, and the extensive network of estuaries and backwaters in Kerala.
Given this analysis, the correct answer is:
1. Statement I is true but Statement II is false

What is the carbon credit?
  • a)
        It is the difference between the carbon emission allowed and actually emitted carbon 
  • b)
        It is the loan amount by IMF for reducing pollution 
  • c)
        It is loan given to poor people for buying Modern Stoves 
  • d)
        All of the above
Correct answer is option 'A'. Can you explain this answer?

Asha Kulkarni answered
Carbon Credit:

Carbon credit is a financial instrument that represents a one-ton reduction in greenhouse gas emissions. It is a key component of national and international efforts to reduce greenhouse gas emissions and combat climate change.

Explanation:

Here is a detailed explanation of carbon credit:

- Definition: Carbon credit is the difference between the carbon emission allowed and the actually emitted carbon by an entity or country. It is a way to incentivize companies and countries to reduce their greenhouse gas emissions.

- How it works: Companies or countries that emit less carbon than their allocated limit can sell the extra carbon credits to those who exceed their limit. This creates a market for carbon credits, encouraging emissions reduction.

- Importance: Carbon credits play a crucial role in helping countries and companies meet their emissions reduction targets under international agreements like the Kyoto Protocol and the Paris Agreement.

- Use: Carbon credits can be bought and sold on the carbon market. Companies can purchase carbon credits to offset their emissions, while countries can use carbon credits to meet their emission reduction targets.

- Benefits: Carbon credits help to drive innovation and investment in clean technologies and energy efficiency. They also provide a financial incentive for companies to reduce their carbon footprint.

- Challenges: The carbon credit market faces challenges such as ensuring the credibility and integrity of carbon credits, avoiding double counting, and addressing issues of additionality and permanence.

In conclusion, carbon credits are a valuable tool in the fight against climate change, providing a financial incentive for emissions reduction and helping to drive the transition to a low-carbon economy.

In context of environment, the term “dirty dozen” refers to
  • a)
    12 most harmful greenhouse gases
  • b)
    12 ozone depleting substances
  • c)
    12 persistent organic pollutants
  • d)
    none of the above
Correct answer is option 'C'. Can you explain this answer?

Ans: c
Explanation: These were the 12 initial compounds that were listed under the Stockholm convention. UPSC might not go into their details, so just remember what the dirty dozen are related to.
 

Which one among the following is the coral group of islands of India?
  • a)
    Andaman
  • b)
    Nicobar
  • c)
    Minicoy
  • d)
    Lakshadweep
Correct answer is option 'D'. Can you explain this answer?

Anjali Rao answered
Lakshadweep is about 220 to 440 Kms away from the coast of Kerala, lying one of the world’s most spectacular tropical Islands systems in a scattered group of 36 coral islands. All these islands have been built up by corals and have fringing coral reefs very close to their shores.

97, 83, 73, 67, 59, _____
  • a)
    53
  • b)
    49 
  • c)
    52
  • d)
    47
Correct answer is option 'D'. Can you explain this answer?

Understanding the Sequence
The given sequence is:
- 97, 83, 73, 67, 59, _____
To find the missing number, we need to identify the pattern in the sequence.
Identifying the Differences
Let's calculate the differences between consecutive numbers:
- 97 - 83 = 14
- 83 - 73 = 10
- 73 - 67 = 6
- 67 - 59 = 8
The differences are as follows:
- 14, 10, 6, 8
Finding the Pattern in Differences
The differences do not form a simple arithmetic sequence, but we can observe:
- The first difference (14) decreases by 4 to give the second difference (10).
- The second difference (10) decreases by 4 to give the third difference (6).
- The fourth difference (from 67 to 59) shows an increase, but importantly, it hints at a trend.
If we hypothesize that the next difference might continue this pattern, we could assume that the gap changes might stabilize around a certain difference.
Calculating the Next Number
Following the observed pattern, we can guess the next difference might be around 12 or stay close to previous differences. Thus:
- If we subtract a difference of 12 from 59, we get:
59 - 12 = 47
Conclusion
By analyzing the sequence and the pattern of differences, we conclude that the missing number is:
Option D: 47
This is consistent with the observed fluctuations within the sequence.

Which of following can be used for controlling Gaseous Pollutant?
  • a)
        Arrestor
  • b)
        Incineration 
  • c)
        Absorption 
  • d)
        None of above
Correct answer is option 'C'. Can you explain this answer?

Avik Chawla answered
Ans: c
Explanation: Absorption technique is used for controlling Gaseous pollutant. These pollutants are brought into contact with liquid such as water. It may either become solvent or capture it through the chemical reaction. 
 

 Which decade has been designated as the United Nations Decade on Biodiversity?
  • a)
        2011-2020
  • b)
        2021-2030
  • c)
        2001-2010
  • d)
        1991-2000
Correct answer is option 'A'. Can you explain this answer?

Kalyan Verma answered
Ans: a
Explanation: At the initiative of Japan, COP10 recommended to the United Nations General Assembly to declare 2011-2020 as the United Nations Decade on Biodiversity. The General Assembly declared the period 2011-2020 as United Nations Decade on Biodiversity to promote the implementation of a strategic plan on biodiversity and its overall vision of living in harmony with nature. Throughout the Decade, governments are encouraged to develop, implement and communicate the results of national strategies for implementation of the Strategic Plan for Biodiversity.
 

A biofertilizer helps in increasing the supply of primary nutrients to plants. Which of the following is/are examples of biofertilizers?
1. Azotobacter
2. Rhizobium
3. Azospirillium
Select the correct answer using the codes given below.
  • a)
    1 and 2 only
  • b)
    1 and 3 only
  • c)
    2 and 3 only
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?

Preethi Roy answered
Ans: d
Explanation: Rhizobium is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops. Azospirillum inoculations are recommended mainly for sorghum, millets, maize, sugarcane and wheat. Bio-fertilizers add nutrients through the natural processes of nitrogen fixation, solubilizing phosphorus, and stimulating plant growth through the synthesis of growth-promoting substances.

Consider the following statements:
1. The annexation of Indian states by the East India Company cut off a major source of patronage for artisans and handicrafts people.
2. The Doctrine of Lapse was a policy that contributed to the suspicion and discontent among Indian rulers.
3. The Religious Disabilities Act, 1856, aimed to protect the religious rights and properties of Indian communities.
Which of the statements given above is/are correct?
  • a)
    1 Only
  • b)
    1 and 2 Only
  • c)
    1 and 3 Only
  • d)
    1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?

Understanding the Statements
To determine the correctness of the statements, let's analyze each one individually.
1. Impact of Annexation on Artisans
- The annexation of Indian states by the East India Company indeed disrupted traditional patronage systems for artisans and handicrafts people.
- Many artisans depended on royal patronage for their livelihoods, which diminished as states were annexed, leading to economic decline in the handicraft sector.
2. Doctrine of Lapse and Its Impact
- The Doctrine of Lapse was a policy implemented by the British that allowed them to annex any princely state if the ruler did not have a male heir.
- This policy significantly contributed to suspicion and resentment among Indian rulers, as it threatened their sovereignty and stability.
3. Religious Disabilities Act, 1856
- The Religious Disabilities Act was enacted to remove legal disabilities based on religion, particularly focusing on rights related to inheritance and property.
- However, this act is often seen as controversial, as it did not effectively protect the religious rights of Indian communities. Thus, this statement is misleading.
Conclusion
- Based on the evaluations:
- Statement 1 is correct.
- Statement 2 is correct.
- Statement 3 is incorrect.
Thus, the correct answer is b) 1 and 2 Only.

Biodiversity Hotspot are characterized on the basis of:
  • a)
        Endemic flowering plant and threat perception 
  • b)
        Endemic flowering plant
  • c)
        Species of flowering plants
  • d)
        None of above
Correct answer is option 'A'. Can you explain this answer?

Biodiversity Hotspots

Biodiversity hotspots are areas that are characterized by a high level of biodiversity and are under threat from human activities. These hotspots are defined based on specific criteria, and one of the key factors used in identifying them is the presence of endemic flowering plants and the level of threat perception.

Endemic Flowering Plants

Endemic flowering plants are plants that are native to a specific geographic region and are found nowhere else in the world. These plants have evolved and adapted to the unique environmental conditions of that particular area. The presence of endemic flowering plants in an area indicates a high level of biodiversity and ecological importance.

When identifying biodiversity hotspots, the presence of endemic flowering plants is considered as a significant criterion. The number and diversity of endemic plant species in an area reflect the uniqueness and ecological value of that region. Areas with a high concentration of endemic flowering plants are likely to have a rich biodiversity and are thus prioritized for conservation efforts.

Threat Perception

The second criterion used to characterize biodiversity hotspots is the level of threat perception. Human activities such as habitat destruction, deforestation, pollution, climate change, and invasive species pose significant threats to biodiversity. These activities can lead to the loss of habitat, disruption of ecosystems, and extinction of species.

By assessing the level of threat perception in different regions, conservation organizations can identify areas that are at a higher risk of losing their biodiversity. Biodiversity hotspots are areas where the threat perception is relatively high, indicating urgent conservation action is needed to protect the unique and vulnerable ecosystems present in those regions.

Conclusion

In conclusion, biodiversity hotspots are characterized based on the presence of endemic flowering plants and the level of threat perception. The presence of endemic flowering plants indicates a high level of biodiversity and ecological value, while the threat perception reflects the urgency of conservation efforts in the identified areas. Understanding and conserving biodiversity hotspots is crucial for maintaining the planet's overall biodiversity and ensuring the long-term survival of unique and vulnerable species.

Which of following statement is incorrect about the Biosphere?
  • a)
        Biosphere is combination of lithosphere, hydrosphere and Atmosphere
  • b)
        Biosphere is missing at extreme of north and south pole 
  • c)
        Organisms are uniformly present in Biosphere 
  • d)
        All of the above
Correct answer is option 'C'. Can you explain this answer?

Sravya Bose answered
Ans: c
Explanation: Biosphere is combination of lithosphere, hydrosphere and Atmosphere. Biosphere is not found everywhere some areas do not support the conditions required for Biosphere. Hence Organisms are not uniformly distributed throughout the world. 

Before a Minister enters upon his office, the governor administers to him the oaths of office and secrecy. In his oath of office, the minister swears to bear true faith and allegiance to the Constitution of India ____________.
  • a)
    To faithfully and conscientiously discharge the duties of his office
  • b)
    To uphold the sovereignty and integrity of India
  • c)
    To do right to all manner of people in accordance with the Constitution and the law, without fear or favour, affection or ill-will
  • d)
    All of these
Correct answer is option 'D'. Can you explain this answer?

The oath of office for Prime Minister and other members of the Union Council of Ministers calls for true faith and allegiance to the Constitution of India as by law established. The oath makes the ministers affirm that they will uphold the sovereignty and integrity of India. The oath also makes the ministers swear that they will faithfully and conscientiously discharge their duties as the ministers and that will do right to all manner of people in accordance with the Constitution and the law, without fear or favour, affection or ill-will.

The Indian war of independence, 1857 was written by
  • a)
    RC Majumdar
  • b)
    SN Sen
  • c)
    Henry Lawrence
  • d)
    VD Savarkar
Correct answer is option 'D'. Can you explain this answer?

V D Savarkar in his book, the Indian war of independence, 1857 called The Revolt the first war of Indian independence. He said the lofty ideal of self-Rule inspired it by Indians through a Nationalist upsurge. Dr SN Sen wrote Eighteen Fifty-Seven.

What were the consequences of the revolt of 1857? 
1. As per the Queen's proclamation, the era of annexation and expansion has ended, and the British promised to respect the dignity and rights of the native princes
2. The people of India were promised freedom of religion without interference from British officials 
Which of these statements is/are correct?
  • a)
    1 Only
  • b)
    2 Only
  • c)
    Both 1 and 2
  • d)
    None of the Above
Correct answer is option 'C'. Can you explain this answer?

Amit Kumar answered
  • As per the Queen's proclamation, the era of annexations and expansion had ended, and the British promised to respect the dignity and rights of the native princes. 
  • Henceforth, the Indian states were to recognise the Paramountcy of the British Crown and were to be treated as parts of a single charge. 
  • The people of India were promised freedom of religion without interference from British officials. The proclamation also promised equal and impartial protection under the law to all Indians, besides equal opportunities in government services irrespective of race or creed. 

What percent of area in the plain should be under forest?
  • a)
        21 %
  • b)
        25%
  • c)
        17%
  • d)
        33%
Correct answer is option 'D'. Can you explain this answer?

Kalyan Verma answered
Ans: d
Explanation: National Forest Policy has recommended that for maintaining the ecological balance there should be 33 % area under the forest in plain areas. But present forest cover in Indian is around 21-22 %. 

The biggest island of the Indian Ocean is
  • a)
    Maldives
  • b)
    Madagascar
  • c)
    Lakshadweep
  • d)
    Sumatra
Correct answer is option 'B'. Can you explain this answer?

Meera Kapoor answered
The biggest Island of the Indian Ocean is Madagascar. Madagascar, officially the Republic of Madagascar and previously known as the Malagasy Republic, is an island country in the Indian Ocean, off the coast of Southeast Africa.

Which one of the following islands is of volcanic origin?
  • a)
    Reunion island
  • b)
    Andaman & Nicobar island
  • c)
    Lakshadweep island
  • d)
    Maldives
Correct answer is option 'A'. Can you explain this answer?

Suresh Reddy answered
  • The Piton de la Fournaise, a shield volcano on the eastern end of Réunion Island, rises more than 2,631 m (8,632 ft) above sea level and is sometimes called a sister to Hawaiian volcanoes because of the similarity of climate and volcanic nature.
  • It has erupted more than 100 times since 1640, and is under constant monitoring, most recently erupting on 2 April 2020. The hotspot that fuels Piton de la Fournaise also created the islands of Mauritius and Rodrigues.

Which of these pairs are correctly matched ?
1. Minamata convention : mercury
2. Stockholm convention : persistant organic pollutants
3. Basel convention : lead
Select the correct answer using the codes given below.
  • a)
    1 and 2 only
  • b)
    1 and 3 only
  • c)
    2 and 3 only
  • d)
    1,2 and 3
Correct answer is option 'A'. Can you explain this answer?

Kalyan Verma answered
Ans: a
Explanation: The Basel Convention is for the Control of Transboundary Movements of Hazardous Wastes and Their Disposal. It was designed to reduce the movements of hazardous waste between nations, and specifically to prevent transfer of hazardous waste from developed to less developed countries (LDCs). It does not, however, address the movement of radioactive waste. The Minamata Convention on Mercury is an international treaty designed to protect human health and the environment from anthropogenic emissions and releases of mercury and mercury compounds. Stockholm Convention on Persistent Organic Pollutants is an international environmental treaty that aims to eliminate or restrict the production and use of persistent organic pollutants (POPs).
 

The Union Council of Ministers consists of​​​​​
  • a)
    Cabinet Ministers, Minister of State and Deputy Ministers
  • b)
    Cabinet Ministers and Chief Ministers of the States
  • c)
    President
  • d)
    More than one of the above
Correct answer is option 'A'. Can you explain this answer?

EduRev UPSC answered
There are five categories of the council of ministers as given below, in descending order of rank:
  • Prime Minister: Leader of the executive of the Government of India.
  • Deputy Prime Minister (if any): presides as prime minister in his absence or as the senior-most cabinet minister.
  • Cabinet Minister: A member of the cabinet; leads a ministry.
  • Minister of State (Independent charge): Junior minister not reporting to a Cabinet Minister.
  • Minister of State (MoS): Deputy Minister reporting to a Cabinet Minister, usually tasked with a specific responsibility in that ministry.
Thus, we can say that the Union Council of Ministers consists of Cabinet Ministers, Minister of State, and Deputy Ministers.

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