JEE Main 2023 (Online) 31st January Evening Shift | Solutions Question 30 | Chemistry

1

JEE Main 2023 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Evaluate the following statements for their correctness.

A. The elevation in boiling point temperature of water will be same for $0.1 \mathrm{M} \, \mathrm{NaCl}$ and $0.1 \mathrm{M}$ urea.

B. Azeotropic mixtures boil without change in their composition.

C. Osmosis always takes place from hypertonic to hypotonic solution.

D. The density of $32 \% \, \mathrm{H}_{2} \mathrm{SO}_{4}$ solution having molarity $4.09 ~\mathrm{M}$ is approximately $1.26 \mathrm{~g} \mathrm{~mL}^{-1}$

E. A negatively charged sol is obtained when KI solution is added to silver nitrate solution.

Choose the correct answer from the options given below :

A

A, B and D only

B

A and C only

C

B and D only

D

B, D and E only

2

JEE Main 2023 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	List I		List II
A.	van't Hoff factor, i	I.	Cryoscopic constant
B.	$$\mathrm{k_f}$$	II.	Isotonic solutions
C.	Solutions with same osmotic pressure	III.	$$\mathrm{\frac{Normal\,molar\,mass}{Abnormal\,molar\,mass}}$$
D.	Azeotropes	IV.	Solutions with same composition of vapour above it

Choose the correct answer from the options given below :

A

A-III, B-I, C-IV, D-II

B

A-III, B-I, C-II, D-IV

C

A-III, B-II, C-I, D-IV

D

A-I, B-III, C-II, D-IV

3

JEE Main 2023 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

In the depression of freezing point experiment

A. Vapour pressure of the solution is less than that of pure solvent

B. Vapour pressure of the solution is more than that of pure solvent

C. Only solute molecules solidify at the freezing point

D. Only solvent molecules solidify at the freezing point

Choose the most appropriate answer from the options given below :

A

A and C only

B

A only

C

A and D only

D

B and C only

4

JEE Main 2022 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Boiling point of a $$2 \%$$ aqueous solution of a non-volatile solute A is equal to the boiling point of $$8 \%$$ aqueous solution of a non-volatile solute B. The relation between molecular weights of A and B is

A

$$\mathrm{M}_{\mathrm{A}}=4 \mathrm{M}_{\mathrm{B}}$$

B

$$\mathrm{M}_{\mathrm{B}}=4 \mathrm{M}_{\mathrm{A}}$$

C

$$\mathrm{M}_{\mathrm{A}}=8 \mathrm{M}_{\mathrm{B}}$$

D

$$\mathrm{M}_{\mathrm{B}}=8 \mathrm{M}_{\mathrm{A}}$$