Previous year MCQs

UPPSC 2022 GS-I General science
Question

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): A solution of table salt in a glass of water is homogeneous.
Reason (R): A solution having different composition throughout is homogeneous.

Select the correct answer from the code given below:
Code:

Answer & Solution

Answer: (Detailed Solution Below)

Option B: (A) is true but (R) is false

Detailed Solution:

The correct answer is “(A) is true but (R) is false”.

Assertion (A) is true: A solution of table salt (sodium chloride) in water is homogeneous because the salt completely dissolves in the water, resulting in a uniform mixture.

Reason (R) is false: A homogeneous solution has a uniform composition throughout, while a solution with different compositions throughout would be classified as heterogeneous.

Therefore, the reasoning does not correctly explain the assertion.

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Select the correct answer from the code given below :
Code:
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Consider the following statements and give the answer with the help of codes given below:

Assertion (A): Only one side of the moon's surface is visible from the earth.
Reason (R): The period of rotation of the moon on its axis is equal to the period of its revolution round the earth.

Code:
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