- Exam
- JEE Main
- Year
- 2023
- Date
- 1 February
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- s Block Elements
JEE Main 2023 · 1 February · Evening Shift · Chemistry · s Block Elements
Given below are two statements : one is labelled as Assertion (A)...
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:
Options
- ABoth (A) and (R) are correct but (R) is not the correct explanation of (A).
- B(A) is correct but (R) is not correct.
- C(A) is not correct but (R) is correct.
- DBoth (A) and (R) are correct and (R) is the correct explanation of (A).
Correct answer
A. Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Step-by-step solution
Gypsum board is also known as plasterboard, drywall or wall board. It consists of the paper surface and non-combustible core. These boards are easy to install. It has excellent fire resistance. Helps in sound isolation by preventing the transfer of unnecessary sound. It is less expensive and has great durability.
When exposed to high temperatures, gypsum only delays the temperature rise and cannot prevent shrinkage and crack from occurring, which can lead to the eventual collapse or failure of gypsum-based products.
Hence, both (A) and (R) are true but (R) is not the correct explanation of (A).