JEE Main 2022 · 25 Jun · Shift 2 · Chemistry Q73

ChemistrySingle correct+4 / -1Question 73 of 90

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: A mixture contains benzoic acid and napthalene. The pure benzoic acid can be separated out by the use of benzene.

Reason R: Benzoic acid is soluble in hot water.

In the light of the above statements, choose the most appropriate answer from the options given below.

Both A and R are true and R is the correct explanation of A.

Both A and R are true but R is NOT the correct explanation of A.

A is true but R is false.

A is false but R is true.

Answer and worked solution

Official answer: D

Assertion is false: both benzoic acid and naphthalene dissolve in benzene, so benzene cannot separate them.

Reason is true: benzoic acid dissolves in hot water (naphthalene does not), which is how they are separated.

(D)

Topics:Purification and characterisation

JEE Main 2022 · 25 Jun · Shift 2, Chemistry question 73