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Test: Class 9 General Science NCERT Based - 4 - UPSC MCQ


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30 Questions MCQ Test Science & Technology for UPSC CSE - Test: Class 9 General Science NCERT Based - 4

Test: Class 9 General Science NCERT Based - 4 for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Class 9 General Science NCERT Based - 4 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Class 9 General Science NCERT Based - 4 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Class 9 General Science NCERT Based - 4 below.
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Test: Class 9 General Science NCERT Based - 4 - Question 1

The anti-viral protein is known as:

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 1
  • Viral proteins are proteins generated by a virus. As viruses hijack much of their host's cellular machinery to support their life cycle, they encode very few of their own genes; viral proteins are therefore generally structural components, for the viral envelope and capsid.

  • Non-structural proteins and regulatory or accessory proteins can also be viral proteins. Antiviral proteins are proteins that are induced by human or animal cells to interfere with viral replication.

  • These proteins are isolated to inhibit the virus from replicating in a host's cells and stop it from spreading to other cells.

Test: Class 9 General Science NCERT Based - 4 - Question 2

What is the other name of rabbis?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 2
  • Rabies is a viral disease that is spread through the animal bite such as the dog. It is caused by the infection of rabies virus.

  • The infection caused from this leads to encephalomyelitis i.e the inflammation of the brain as well as the spinal cord.

  • The transmission of the virus happens through the saliva and affects the CNS or Central nervous system. This virus belongs to the family called Rhabdoviridae.

Test: Class 9 General Science NCERT Based - 4 - Question 3

Children are vaccinated against polio because

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 3
All the statements are correct.

Test: Class 9 General Science NCERT Based - 4 - Question 4

Which of the following is a mismatch?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 4
  • AIDS or Acquired Immune Deficiency Syndrome is a syndrome caused by the HIV virus.

  • In this condition, a person’s immune system becomes too weak to fight off any kind of infection or disease. AIDS is usually the last stage of HIV infection; a stage where the body can no longer defend itself and thus spawns various diseases.

Test: Class 9 General Science NCERT Based - 4 - Question 5

Which bacteria is responsible for causing typhoid?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 5
  • Salmonella typhi is the bacterium responsible for this disease and humans are the only carriers.

  • The first case of typhoid fever was reported in the United States in the early 1900’s. Overall, about 21 million people are infected with this disease annually, and about 200,000 cases are fatal.

Test: Class 9 General Science NCERT Based - 4 - Question 6

The disease which are present since birth and are due to some genetic disorder is called:

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 6
  • Congenital refers to a condition or disease which is present at birth. The condition can be inherited (genetic) or caused by environmental factors. Some maternal infections, such as HIV, can be passed onto the child and cause a congenital condition.

Test: Class 9 General Science NCERT Based - 4 - Question 7

Diarrhea, cholera, typhoid are the diseases that have one thing in common that is

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 7
Common Characteristics of Diarrhea, Cholera, and Typhoid:
Answer: D. All of the above
These three diseases, diarrhea, cholera, and typhoid, share the following common characteristics:
1. Caused by bacteria: All three diseases are caused by bacterial infections, although they are caused by different types of bacteria. Diarrhea can be caused by various bacteria, including E. coli and Salmonella. Cholera is caused by the bacterium Vibrio cholerae. Typhoid is caused by the bacterium Salmonella typhi.
2. Transmitted by contaminated food and water: The bacteria that cause these diseases are primarily transmitted through the consumption of contaminated food and water. Poor sanitation and hygiene practices, as well as inadequate water treatment, can contribute to the spread of these bacteria.
3. Treatable with antibiotics: While not all cases of diarrhea, cholera, and typhoid require antibiotics, they can be effective in treating severe cases or preventing complications. Antibiotics are used to kill or inhibit the growth of the bacteria responsible for these infections.
In conclusion, all three diseases - diarrhea, cholera, and typhoid - share the common characteristics of being caused by bacteria, transmitted through contaminated food and water, and can be treated with antibiotics. Therefore, the correct answer is D. All of the above.
Test: Class 9 General Science NCERT Based - 4 - Question 8

Which of the following statements is correct regarding vaccination?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 8

It develops resistance against pathogen attack.

Test: Class 9 General Science NCERT Based - 4 - Question 9

If you live in an overcrowded and poorly ventilated house, it is possible that you may suffer from

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 9
Airborne Transmission: Some infectious agents remain suspended in the air for a long period of time. These pathogens might attack the immune system of a person in contact. For eg., if you enter a room that was initially occupied by a patient of measles, you too might catch the infection.

Test: Class 9 General Science NCERT Based - 4 - Question 10

An organism which harbours a pathogen and may pass it on to another person to cause a disease is known as

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 10
A vector is an organism that does not cause disease itself but that transmits infection by conveying pathogens from one host to another. Vectors may be mechanical or biological.

Test: Class 9 General Science NCERT Based - 4 - Question 11

Arrange the following components in decreasing order according to their percentage present in air.

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 11
The major components of the air are: Nitrogen - 78% Oxygen - 20% Argon - 0.93% Carbon dioxide - 0.031% Other gases such as Neon, Helium, Hydrogen etc, are present in trace amounts.

Test: Class 9 General Science NCERT Based - 4 - Question 12

The term "water-pollution" can be defined in several ways. Which of the following statements does not give the correct definition?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 12

A change in pressure of the water bodies

Test: Class 9 General Science NCERT Based - 4 - Question 13

Which one of the following is not a cause of ozone depletion?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 13
All of these are responsible for ozone depletion.

Test: Class 9 General Science NCERT Based - 4 - Question 14

The nitrogen molecules present in air can be converted into nitrates and nitrites by:

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 14
  • Nitrogen fixation is the essential biological process and the initial stage of the nitrogen cycle. In this process, nitrogen in the atmosphere is converted into ammonia (another form of nitrogen) by certain bacterial species like Rhizobium, Azotobacter, etc. and by other natural phenomena.

  • Plants are the main source of food. The nutrients obtained from plants are synthesized by plants using various elements which they obtain from the atmosphere as well as from the soil.

  • This group of elements includes nitrogen as well. Plants obtain nitrogen from the soil through the process of protein synthesis. Unlike carbon dioxide and oxygen, atmospheric nitrogen cannot be obtained through the stomata of leaves.

  • Because the concentration of nitrogen gas present in the atmosphere can not be directly used by plants and also the concentration of the usable form of nitrogen in the atmosphere is very less. There are certain bacteria and some natural phenomena which help in Nitrogen fixation.

Test: Class 9 General Science NCERT Based - 4 - Question 15

The water cycle in nature involves which of the following processes sequentially?

The water cycle in nature involves : Evaporation, condensation and precipitation.

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 15
Water Cycle in Nature
The water cycle is a continuous process that involves the movement of water between the earth's surface and the atmosphere. It consists of several processes that occur in a sequential manner.
The processes in the water cycle are:
1. Evaporation:
- Evaporation is the process by which water changes from a liquid to a gaseous state.
- Heat from the sun causes the water on the earth's surface to evaporate.
- Water molecules gain enough energy to escape from the surface and enter the atmosphere as water vapor.
2. Condensation:
- Condensation is the process by which water vapor changes back into liquid water.
- As the water vapor rises into the atmosphere, it cools down and loses energy.
- This causes the water vapor to condense and form tiny droplets or ice crystals, which become visible as clouds.
3. Precipitation:
- Precipitation occurs when the condensed water droplets or ice crystals in the clouds become too heavy to remain suspended in the atmosphere.
- These droplets or crystals combine to form larger water droplets or ice particles, which fall from the clouds as precipitation.
- Precipitation can take various forms such as rain, snow, sleet, or hail.
The correct sequence of processes in the water cycle is:
- Evaporation
- Condensation
- Precipitation
Therefore, the correct answer is option C: Evaporation, condensation, and precipitation.
Test: Class 9 General Science NCERT Based - 4 - Question 16

Select the incorrect statement regarding the rainfall with low pH.

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 16
Rain with low pH is called acid rain. Acid rain is caused when sulphuric acid and nitric acid are formed in the atmosphere by reaction of oxides of nitrogen and sulphur with moisture present in air. These oxides are released into atmospheric air by combustion of fossil fuels, i.e., conventional sources of energy.

Test: Class 9 General Science NCERT Based - 4 - Question 17

Match column I with column II and select the correct option from the given codes.

Column I

(a) Particulate matter

(b) Heat

(c) Detergent

(d) Plastic

(e) Vegetable peel

Column II

(i) Chemical water pollutant

(ii) Non-degradable soil pollutant

(iii) Degradable

(iv) Air pollutant

(v) Physical water pollutant

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 17

To match the items in Column I with the appropriate descriptions in Column II, we need to understand the characteristics of each item.
Column I:
(a) Particulate matter: Refers to small particles suspended in the air or water.
(b) Heat: Represents the transfer of thermal energy.
(c) Detergent: A cleaning agent that contains surfactants and helps remove dirt and stains.
(d) Plastic: A synthetic material made from polymers that is non-biodegradable.
(e) Vegetable peel: The outer covering of fruits and vegetables that is often discarded.
Column II:
(i) Chemical water pollutant: Refers to substances that contaminate water and have chemical properties that can be harmful.
(ii) Non-degradable soil pollutant: Represents pollutants that do not break down easily in the soil, leading to long-term environmental impact.
(iii) Degradable: Describes materials that can be broken down or decomposed by natural processes.
(iv) Air pollutant: Refers to substances released into the air that can be harmful to human health and the environment.
(v) Physical water pollutant: Represents substances or particles that physically contaminate water, affecting its quality.
Now, let's match the items in Column I with the appropriate descriptions in Column II:
- (a) Particulate matter: (iv) Air pollutant
- (b) Heat: (iii) Degradable
- (c) Detergent: (i) Chemical water pollutant
- (d) Plastic: (ii) Non-degradable soil pollutant
- (e) Vegetable peel: (v) Physical water pollutant
Therefore, the correct match is option B: (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii), (e)-(v).
Test: Class 9 General Science NCERT Based - 4 - Question 18

Which one among the following is not a layer of atmosphere?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 18
There are five layers in the structure of the atmosphere depending upon temperature.

These layers are:

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

Test: Class 9 General Science NCERT Based - 4 - Question 19

Few characteristics of a type of soil are given below. Find the type of the soil based on the given characteristics.

1. Presence of iron oxides in the soil.

2. Formed by the erosion of rocks in areas of high temperature.

3. Soil appears red in colour.

4. Found in western and eastern ghats.

5. Soil is not very fertile.

These are the characteristics of laterite soil.

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 19
Characteristics of Laterite Soil:
- Presence of iron oxides in the soil
- Formed by the erosion of rocks in areas of high temperature
- Soil appears red in colour
- Found in western and eastern ghats
- Soil is not very fertile
Explanation:
The characteristics mentioned above are indicative of laterite soil. Let's break down each characteristic and explain why it points to laterite soil:
1. Presence of iron oxides in the soil: Laterite soil is rich in iron oxides, which gives it a reddish color. This characteristic is consistent with laterite soil.
2. Formed by the erosion of rocks in areas of high temperature: Laterite soil is formed through the weathering and erosion of rocks in hot and humid tropical regions. This characteristic matches the formation process of laterite soil.
3. Soil appears red in colour: As mentioned earlier, the presence of iron oxides in laterite soil gives it a reddish color. This characteristic aligns with laterite soil.
4. Found in western and eastern ghats: Laterite soil is commonly found in the western and eastern ghats of India. This characteristic specifically points to laterite soil.
5. Soil is not very fertile: Laterite soil is known to be relatively infertile due to its high iron content and leaching of nutrients. This characteristic supports the identification of laterite soil.
Conclusion:
Based on the given characteristics, it can be concluded that the soil type described is laterite soil.
Test: Class 9 General Science NCERT Based - 4 - Question 20

What would happen, if all the oxygen present in the environment is converted to ozone?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 20
  • Ozone is a poisonous gas and is thus only present in a thin layer in the stratosphere. lf all the oxygen is converted to ozone, the environment will become poisonous and kill all living forms. Ozone is O3, in its elemental form or even in its combined form it is highly toxic.

  • Ozone can damage lungs and even low amounts of ozone can cause chest pain, coughing, shortness of breath and lung irritation.However at the stratospheric level, no life form exists and there ozone prevents us from the harmful U.V radiations of the sun.

Test: Class 9 General Science NCERT Based - 4 - Question 21

Which of the following are the three primary nutrients needed for plant growth?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 21
Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK.

Test: Class 9 General Science NCERT Based - 4 - Question 22

Which of the following is a food-fodder mixed farming system?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 22
Mixed farming systems can be defined as –

(i).The use of a single farm for multiple purposes, as the growing of cash crops or the raising of livestock is called mixed farming.

(ii) Farming involving both the growing of crops and the keeping of livestock is called mixed farming.

(iii) A type of commercial agriculture concerned with the production of both crops and animals on one farm. Stock on a mixed farm used to be grazed on fallow land, but many modern mixed farms produce some, or all, of their fodder crops.

Test: Class 9 General Science NCERT Based - 4 - Question 23

Why is organic manure considered better than fertilisers?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 23
Organic manure or organic fertilizer is made up of organic biodegradable waste like animal excreta and agriculture wastes. As it is biodegradable it cannot harm the environment and increase the soil fertility it is better than chemical fertilizer. But chemical fertilizers are nutrient specific and prepared in chemical factories.

Test: Class 9 General Science NCERT Based - 4 - Question 24

Which of the following refers to inland fisheries?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 24
  • Inland fisheries are any activity conducted to extract fish and other aquatic organisms from "inland waters". The term "inland waters" is used to refer to lakes, rivers, brooks, streams, ponds, inland canals, dams, and other land-locked (usually freshwater) waters (such as the Caspian Sea, Aral Sea, etc.).

Test: Class 9 General Science NCERT Based - 4 - Question 25

Which of the following is an important objective of biotechnology in the field of agriculture?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 25
  • Biotechnology is being used to address problems in all areas of agricultural production and processing. This includes plant breeding to raise and stabilize yields; to improve resistance to pests, diseases and abiotic stresses such as drought and cold; and to enhance the nutritional content of foods.

  • Biotechnology is being used to develop low-cost, disease-free planting materials for crops.

Test: Class 9 General Science NCERT Based - 4 - Question 26

Who is called the "Father of Green Revolution" in India?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 26
The Father of Green Revolution in India is M.S. Swaminathan.
Here is a detailed explanation:
1. Introduction:
The Green Revolution in India refers to the period of agricultural advancements and increased crop yields that occurred between the 1960s and 1980s. It aimed to combat food scarcity and improve agricultural productivity.
2. Role of M.S. Swaminathan:
M.S. Swaminathan played a vital role in spearheading the Green Revolution in India. He is often referred to as the "Father of Green Revolution" in the country. Swaminathan was an Indian geneticist and agricultural scientist who dedicated his life to improving agriculture and ensuring food security.
3. Contributions:
Swaminathan made significant contributions to the development and implementation of innovative farming techniques and technologies. Some of his notable contributions include:
- Introducing high-yielding varieties of wheat and rice that were more resistant to diseases, pests, and environmental stresses.
- Promoting the use of fertilizers, irrigation systems, and modern farming practices.
- Advocating for sustainable agricultural practices and conservation of natural resources.
- Emphasizing the importance of empowering farmers and improving their socio-economic conditions.
4. Impact:
Swaminathan's efforts had a transformative impact on Indian agriculture. The Green Revolution led to a significant increase in agricultural production, making India self-sufficient in food production. It helped alleviate poverty, reduce hunger, and improve the overall livelihoods of farmers.
Conclusion:
M.S. Swaminathan's pioneering work and relentless efforts in promoting agricultural advancements and sustainable farming practices earned him the title of the "Father of Green Revolution" in India. His contributions continue to inspire and guide agricultural development in the country.
Test: Class 9 General Science NCERT Based - 4 - Question 27

What is the advantage of crop rotation?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 27
Advantage of crop rotation : Increasing the fertility of soil.

Test: Class 9 General Science NCERT Based - 4 - Question 28

Which of these is a macronutrient of plants?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 28
Macronutrients include carbon, hydrogen, nitrogen, oxygen, phosphorus, potassium, calcium, sulfur, and magnesium. Micronutrients are boron, chlorine, manganese, iron, zinc, copper, and molybdenum. A plant uses these nutrients to support its growth, life cycle, and biological functions.

Test: Class 9 General Science NCERT Based - 4 - Question 29

Which is the Indian breed of high milk-yielding variety of cow?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 29
Sahiwal is a breed of 'Zebu cattle' and is considered to be one of the best milch cattle breeds in India. The breed has derived its name from the Sahiwal area in Montgomery district of Punjab in Pakistan.

Test: Class 9 General Science NCERT Based - 4 - Question 30

Which of the following organisms is/are causes diseases in poultry?

Detailed Solution for Test: Class 9 General Science NCERT Based - 4 - Question 30
Poultry fowl suffers from a number of diseases caused by virus, bacteria, fungi, parasites as well as from nutritional deficiencies.
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