6
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A) :  Glass tumbler breaks in winter when hot water is poured in it.

Reason (R)    :  When hot water is poured. the outer surface of glass expands.

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.

Answer:   C) A is true but R is false.



Explanation:

When in winter, hot water is poured in the glass tumbler. its inner surface tends to expand while the Outer surface in contact with cold atmosphere does not. This opposite interaction causes the tumbler to break. 

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)  :  Pressure cookers are fitted with ebonite handles. 

Reason (R)     :  Ebonite is strong. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: C) A is true but R is false.

Explanation:

The handles of pressure cookers are made of ebonite because it being a bad conductor of heat, does not heat up. 

 

 

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Filed Under: Assertion and Reason

60 14999
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)  :  Diamond is used for cutting glass. 

Reason (R)     :  Diamond has a high refractive index. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: B) Both A and R are true but R is NOT the correct explanation of A.

Explanation:

Diamond is very hard due to its rigid three dimensional structure and so, it is used for cutting glass. Refractive index of diamond is high and gives it the greater transparency and brilliance. 

 

 

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Filed Under: Assertion and Reason

48 13017
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)   :   Simla is colder than Delhi. 

Reason (R)      :  Simla is at a higher altitude as compared to Delhi. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: A) Both A and R are true and R is the correct explanation of A.

Explanation:

Simla is colder than Delhi because it is situated at a higher altitude and temperature decreases by 1°C for every 165 metres of ascent 

 

 

 

 

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Filed Under: Assertion and Reason

21 8315
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)   :   Most of the Himalayan rivers are perennial. 

Reason (R)      :   They are fed by melting snow. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: A) Both A and R are true and R is the correct explanation of A.

Explanation:

Most Himalayan rivers originating in Himalayan peaks are perennial because they are fed by the melting snow throughout the year. 

 

 

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Filed Under: Assertion and Reason

8 7123
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)  :   We feel comfortable in hot and humid climate. 

Reason (R)     :   Sweat evaporates faster in humid climate. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) Both A and R are false.
 
Answer & Explanation Answer: D) Both A and R are false.

Explanation:

We feel uncomfortable in hut and humid climate because in hot weather, body sweats more but due to high humidity, this sweat does not evaporate easily. 

 

 

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Filed Under: Assertion and Reason

15 9886
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion(A)   :   Tamil Nadu gets most of the rainfall in winter. 

Reason (R)     :   Tamil Nadu gets rainfall from retreating monsoons. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: A) Both A and R are true and R is the correct explanation of A.

Explanation:

Rainfall in Tamil Nadu is caused by the retreating monsoons which occur in winter. 

 

 

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Filed Under: Assertion and Reason

7 7341
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion(A)   :    An iron ball floats on mercury but gets immersed in water. 

Reason (R)     :   The specific gravity of iron is more than that of mercury. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: C) A is true but R is false.

Explanation:

Iron with specific gravity less than that of mercury but more than that of water, floats in the former but gets immersed in the second 

 

 

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Filed Under: Assertion and Reason

6 6726
Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)  :    Leakages in household gas cylinders can be detected. 

Reason (R)     :    LPG has a strong smell. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: C) A is true but R is false.

Explanation:

Leakages in household gas cylinders can be detected because of the strong smell of ethyl merceptan mixed with LPG. 

 

 

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Filed Under: Assertion and Reason

3 7191