Verified Solution • 2025–26 Session
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QJEEM23Ch4bfc: JEE Main 2023 Chemistry - Class 11 JEEM23Ch4bfc Solution: Given below are two statements : one is labelled as Assertion…
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 :
Multiple Choice Options
- A Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- B Both (A) and (R) are correct and (R) is the correct explanation of (A)
- C (A) is correct but (R) is not correct
- D (A) is not correct but (R) is correct
Step-by-Step Verified Solution
"Both (A) and (R) are correct but (R) is not the correct explanation of (A)" is the correct answer
Gypsum is indeed used for making fireproof wall boards, but the reason given in (R) that gypsum is unstable at high temperatures is not the correct explanation for why it is used for this purpose. Instead, gypsum is fire-resistant because it does not support combustion and does not emit toxic fumes when exposed to fire.