Question

Assertion: On a rainy day sound travels slower than on a dry day.
Reason: When moisture is present in air the density of air increases.
(A) Both assertion and the reason are correct and reason is the correct explanation for assertion.
(B) Both assertion and the reason are correct and reason is not the correct explanation for assertion.
(C) Assertion is correct but reason is incorrect.
(D) Assertion is incorrect but reason is correct.

Answer 1

Hint :Here, we have been given the two statements in the form of assertion and reason and we have to find that if the assertion and reason are correct or not and also their relation that the reason is the correct explanation for the assertion or not. To know this we have to study the characteristics of sound traveling in air when it’s raining and on a dry day.

Complete Step By Step Answer:
Let us first consider the statement in assertion and its explanation as:
On a rainy day sound travels slower than on a dry day.
Explanation: Here, we know that when there is moisture in air the density of air increases it is because the density of water vapors is more than that of dry air. Also, the sound is inversely proportional to the density of the medium from which the sound travels.
Now, let us consider the reason and its explanation as:
When moisture in the air the density of air increases.
Explanation: The reason is true as we see in the explanation of the assertion above.
So, the correct answer is that the assertion and reason are both correct and the reason is the correct explanation for the assertion.
The correct option is A.

Note :
Here, we have to use the concept of the sound traveling through the medium denser or less dense. This concept will lead us to the correct answer as we have explained above thoroughly. So, keep these concepts in mind and answer these types of questions easily.