Verified Solution • 2025–26 Session
moderate
QJEEM22Ch70ad: JEE Main 2022 Chemistry - Class 12 JEEM22Ch70ad 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) : At 10 C, the density of a 5 M solution of KCl [atomic masses of K & Cl are 39 & 35.5 g mol 1 respectively], is 'x' g ml 1. The solution is cooled to 21 C. The molality of the solution will remain unchanged.
Reason (R) : The molality of a solution does not change with temperature as mass remains unaffected with temperature.
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 true and (R) is the correct explanation of (A).
- B Both (A) and (R) are true but (R) is not the correct explanation of (A).
- C (A) is true but (R) is false.
- D (A) is false but (R) is true.
Step-by-Step Verified Solution
Molality and Mass are temperature Independent so on changing temp., molality and mass remain unchanged.