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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Gypsum is used for making fireproof wall boards. Reason (R) : Gypsum is unstable at high temperatures. In the light of the above statements, choose the correct answer from the options given below (1) Both (A) and (R) are correct and (R) is the correct explanation of (A) (2) (A) is correct but (R) is not correct (3) Both (A) and (R) are correct but (R) is not the correct explanation of (A) (4) (A) is not correct but (R) is correct

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. (A) is correct but (R) is not correct
3. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
4. (A) is not correct but (R) is correct

Correct answer: Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Solution

Gypsum is indeed used to make fireproof wall boards due to its fire-resistant properties, but the reason given is incorrect because gypsum actually decomposes at high temperatures, which does not explain its use in fireproofing.

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