Ameya Khanna

EduRev Class 9

Ameya Khanna
EduRev Class 9
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Discussed Questions

How many parallel lines can be drawn parallel to a given line L and passing through a fixed point P?
  • a)
    0
  • b)
    Infinite
  • c)
    2
  • d)
    1
Correct answer is option 'D'. Can you explain this answer?

Shanaya Ahuja answered  •  3 weeks ago
Understanding Parallel Lines
In geometry, parallel lines are defined as lines in a plane that never meet; they are always the same distance apart. Given this definition, let’s explore the scenario presented in the question.
Given Line L and Fixed Point P
- When you have a specific line L and a fixed point P not on line L, you can draw exactly one line through point P t
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Statement A: Molecules also move from one place to another in wave motion. 
Statement B: Electromagnetic waves don’t need material medium to travel. 
Which of the two statement is true
  • a)
    Neither A or B
  • b)
    Statement B
  • c)
    Statement A
  • d)
    Both A and B
Correct answer is option 'B'. Can you explain this answer?

Shanaya Ahuja answered  •  3 weeks ago
Understanding the Statements
When analyzing the two statements, it's essential to grasp the concepts behind them.
Statement A: Molecules and Wave Motion
- Molecules in a medium do exhibit motion, but this is typically described as translational, rotational, or vibrational rather than wave motion.
- In wave motion, such as sound waves, the disturbance travels throu
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लेखक ने ‘छोटा बादशाह’ किसे कहा है?
  • a)
    वायसराय को
  • b)
    गवर्नर को
  • c)
    लार्ड कर्जन को
  • d)
    लार्ड माउंटबैटन को।
Correct answer is option 'A'. Can you explain this answer?

Shanaya Ahuja answered  •  Jan 22, 2025
‘छोटा बादशाह’ का अर्थ
‘छोटा बादशाह’ एक उपमा है जो लेखक ने वायसराय को दी है। यह उपमा भारतीय राजनीति और ब्रिटिश राज के संदर्भ में प्रयोग की गई है।
वायसराय की भूमिका
- वायसराय, जो ब्रिटिश सरकार का प्रतिनिधि होता था, भारत में सत्तारूढ़ होता था।
- उसे भारत में ब्रिटिश नीति और शासन का कार्यान्वयन करना होता था, इसलिए उसे एक छोटे बादशाह की तरह देखा जाता था।
छोटे
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- यह उपमा यह दर्शाती है कि वायसराय के पास व्यापक शक्तियाँ थीं, लेकिन वह एक असली सम्राट की तरह नहीं था।
- वायसराय को भारतीय उपमहाद्वीप में शासन करने के लिए ब्रिटिश सरकार से अनुमति प्राप्त होती थी, जिससे उसकी स्वतंत्रता सीमित हो जाती थी।
राजनीतिक संदर्भ
- लेखक ने यह उपमा यह दिखाने के लिए दी कि वायसराय की स्थिति कितनी नाजुक और सीमित थी।
- इस उपमा का उपयोग यह समझने में मदद करता है कि भारतीय स्वतंत्रता संग्राम के दौरान वायसराय की भूमिका कितनी महत्वपूर्ण थी, जबकि वह वास्तविक निर्णय लेने में स्वतंत्र नहीं था।
निष्कर्ष
इस प्रकार, वायसराय को ‘छोटा बादशाह’ कहने का तात्पर्य यह है कि वह एक प्रतीकात्मक शक्ति का व्यक्ति था, जिसके निर्णय और कार्य ब्रिटिश साम्राज्य के अधीन होते थे। यह उपमा भारतीय इतिहास के संदर्भ में वायसराय की स्थिति को स्पष्ट करती है।
Shanaya Ahuja upvoted   •  Jan 08, 2025

What fraction of the whole circle is minor arc RP in the given figure ?
  • a)
    1/5 of the circle
  • b)
    1/2 of the circle
  • c)
    1/4 of the circle
  • d)
    1/3 of the circle
Correct answer is option 'D'. Can you explain this answer?

Zachary Foster answered
  1. The central angle subtended by the minor arc RP is:
    Minor arc RP =∠POQ =120
  2. The fraction of the circle represented by the minor arc RP is:
    Fraction=Central Angle / Total Angle of the Circle
    Substituting the values:
    Fraction = 120/ 360= 1 / 3

Why did rutherford's atomic model got rejected class 9th NCERT chemistry?

Shanaya Ahuja answered  •  Dec 21, 2024
Introduction
Rutherford's atomic model, proposed in 1911, was a significant advancement in understanding atomic structure. However, it faced several limitations that led to its rejection.
Key Limitations of Rutherford's Model
- Electron Stability Issue:
According to classical physics, an accelerating electron should radiate energy in the form of electroma
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How does polling take place?

Shanaya Ahuja answered  •  Nov 29, 2024
What is Polling?
Polling is a method used to gather opinions or data from a group of people, often related to political preferences or social issues.
Types of Polling
- Opinion Polls: These gauge public opinion on various topics, such as elections or social issues.
- Exit Polls: Conducted immediately after voters leave polling stations to predict ele
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Which of the following rivers do not form delta ?
(i) Tapi
(ii) Narmada 
(iii) Yamuna
(iv) Ganga           
  • a)
    (i), (ii) and (iv)
  • b)
    (i) and (iii)           
  • c)
    (i) and (iv)         
  • d)
    None of the above 
Correct answer is option 'A'. Can you explain this answer?

Shanaya Ahuja answered  •  Nov 11, 2024
Understanding River Deltas
Rivers form deltas when they deposit sediment as they flow into a standing body of water, such as an ocean, sea, or lake. The characteristics of the river and the geographical features of the area determine whether a delta will form.
Rivers in the Question
Let’s examine the rivers mentioned in the question:
  • Tapi: The Tapi ... more
  • Narmada: Similar to the Tapi, the Narmada River also flows west into the Arabian Sea. Its fast-moving waters and geological features inhibit delta formation.
  • Yamuna: The Yamuna River, a tributary of the Ganga, does not form a substantial delta at its mouth due to its confluence with the Ganga and subsequent flow into the Bay of Bengal.
  • Ganga: The Ganga River does create a significant delta, known as the Sundarbans Delta, where it meets the Bay of Bengal.

Conclusion
Based on the analysis:
- Rivers that do not form deltas: Tapi, Narmada, and Yamuna.
- River that forms a delta: Ganga.
Thus, the correct answer is option 'A', which states that Tapi, Narmada, and Yamuna do not form deltas.

Why an ocean is named after the country india?

Shanaya Ahuja answered  •  Oct 19, 2024
Introduction
The ocean named after India is the Indian Ocean, one of the world's five major oceans. This ocean plays a significant role in global trade, climate, and biodiversity.
Historical Significance
- The name "Indian Ocean" originates from the Indian subcontinent, which is bordered by this ocean to the south.
- It has been a crucial trade route since ancient
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प्रेमी का गाना सुनकर प्रेमिका मन में क्या सोचती है?
  • a)
    वह गाना दुबारा न सुने
  • b)
    वह गाना सुनती जाए
  • c)
    वह भी साथ में गाए
  • d)
    वह उस गीत का हिस्सा बन जाए
Correct answer is option 'D'. Can you explain this answer?

Shanaya Ahuja answered  •  Sep 26, 2024
Understanding the Correct Answer
To explain why option 'D' is the correct answer, it is essential to analyze the question context and the relevant concepts involved.
Key Concepts
- Relevance of Information: Option 'D' must contain the most relevant information or solution to the problem presented in the question. Understanding the core concept is crucial.
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Shanaya Ahuja asked   •  Jan 19, 2024

In India, the windfall tax on petroleum crude was reduced to how many rupees per tonne, as mentioned in the recent government notification?
  • a)
    Rs.2,000
  • b)
    Rs.1,200
  • c)
    Rs.1,700
  • d)
    Rs.2,300
Correct answer is option 'C'. Can you explain this answer?

Aspire Academy answered
The windfall tax on petroleum crude in India was reduced to 1,700 rupees per tonne from the previous 2,300 rupees per tonne, as indicated by a recent government notification. Windfall taxes are designed to address profits resulting from external events, such as energy price rises due to factors like the Russia-Ukraine conflict.

What happens if an individual ignores warming up and cooling down for the workout?
  • a)
    They will become stronger.
  • b)
    They will improve their flexibility.
  • c)
    They will increase the risk of injury, pain, and fatigue.
  • d)
    They will experience improved coordination.
Correct answer is option 'C'. Can you explain this answer?

Shanaya Ahuja answered  •  Jan 09, 2024
Ignoring warming up and cooling down before a workout can have several negative consequences for an individual. The correct answer is option 'C': They will increase the risk of injury, pain, and fatigue. Let's explore this in detail.

1. Importance of Warming Up:
- Warming up before a workout is crucial as it prepares the body for physical activity.
- It helps to gradually incr
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What important decision did he make?     
  • a)
    To grow a thin moustache.     
  • b)
    To keep an attractive smile on his face always.    
  • c)
    Both A and B.    
  • d)
    Neither A nor B.
Correct answer is option 'C'. Can you explain this answer?

Shanaya Ahuja answered  •  Jan 09, 2024
The correct answer is option 'C': Both A and B.

Explanation:
1. Growing a thin moustache:
- Growing a thin moustache can be seen as an important decision because it can significantly change one's appearance and may have various implications.
- For some individuals, growing a moustache can enhance their facial features and make them look more mature or distinguished.
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Shanaya Ahuja asked   •  Oct 18, 2023

Name the cooperative that provides milk and vegetables controlled rate decided by the Government of Delhi :  
                                                                                                                       [2011 (T-2)]
  • a)
    Amul                      
  • b)
    Kendriya Bhandar
  • c)
    Mother Dairy    
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?

Dr Manju Sen answered

The cooperative that provides milk and vegetables at controlled rates decided by the Government of Delhi is Mother Dairy.
Here is a detailed explanation:
Introduction:
- The cooperative mentioned in the question is responsible for providing milk and vegetables at controlled rates.
- The rate at which these products are so
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Shanaya Ahuja asked   •  Aug 08, 2023

For wheat, which of the following combinations is correct?
  • a)
    Genus Triticum, family Poaceae, order Poales, Class Monocotyledonae
  • b)
    Genus Triticum, family Poaceae, order Poales, Class Dicotyledonae
  • c)
    Genus Triticum, family Poaceae, order Sapindales, Class Monocotyledonae
  • d)
     Genus Triticum, family Anacardiaceae, order Poales, Class Monocotyledonae
Correct answer is option 'A'. Can you explain this answer?

Rishika Kaur answered
The correct combination for wheat is option 'A': Genus Triticum, family Poaceae, order Poales, Class Monocotyledonae.

Genus Triticum:
- Wheat belongs to the genus Triticum, which includes various species of grasses that are cultivated for their edible grains.
- The genus Triticum is a group of plants that are commonly known as wheat.

Family Poaceae:
- Wheat be
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Shanaya Ahuja asked   •  Jul 25, 2023

Can I use chapter notes for CBSE Class 9 as a reference for other competitive exams?

Mira Ahuja answered
Using Chapter Notes for CBSE Class 9 as a Reference for Other Competitive Exams

Competitive exams often require a comprehensive understanding of various subjects, including those covered in CBSE Class 9. Chapter notes for Class 9 can be a valuable resource for preparing for these exams. Here's why:

1. Comprehensive Coverage:
Chapter notes for Class 9 provid
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Shanaya Ahuja asked   •  Apr 09, 2022

Oxygen is harmful for
  • a)
    Ferns
  • b)
    Chara
  • c)
    Mango tree
  • d)
    Nitrogen fixing bacteria
Correct answer is option 'D'. Can you explain this answer?

Oxygen degrades nitrogenases easily. Therefore, in the presence of oxygen, several bacteria avoid producing the enzyme.: Oxygen is this harmful for Nitrogen-fixing bacteria.

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