JEE Main 2022 (Online) 29th July Evening Shift | Surface Chemistry Question 27 | Chemistry

1

JEE Main 2022 (Online) 29th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Given below are the critical temperatures of some of the gases:

Gas	Critical temperature (K)
He	5.2
CH$$_4$$	190.0
CO$$_2$$	304.2
NH$$_3$$	405.5

The gas showing least adsorption on a definite amount of charcoal is

A

He

B

CH$$_4$$

C

CO$$_2$$

D

NH$$_3$$

2

JEE Main 2022 (Online) 29th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

$$100 \mathrm{~mL}$$ of $$5 \%\,(\mathrm{w} / \mathrm{v})$$ solution of $$\mathrm{NaCl}$$ in water was prepared in $$250 \mathrm{~mL}$$ beaker. Albumin from the egg was poured into $$\mathrm{NaCl}$$ solution and stirred well. This resulted in a/an :

A

Lyophilic sol

B

Lyophobic sol

C

Emulsion

D

Precipitate

3

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Match List - I with List - II.

	List - I Reaction		List - II Catalyst
(A)	$$4N{H_3}(g) + 5{O_2}(g) \to 4NO(g) + 6{H_2}O(g)$$	(I)	$$NO(g)$$
(B)	$${N_2}(g) + 3{H_2}(g) \to 2N{H_3}(g)$$	(II)	$${H_2}S{O_4}(l)$$
(C)	$${C_{12}}{H_{22}}{O_{11}}(aq) + {H_2}O(l) \to \mathop {{C_6}{H_{12}}{O_6}}\limits_{Glu\cos e} + \mathop {{C_6}{H_{12}}{O_6}}\limits_{Fructose} $$	(III)	$$Pt(s)$$
(D)	$$2S{O_2}(g) + {O_2}(g) \to 2S{O_3}(g)$$	(IV)	$$Fe(s)$$

Choose the correct answer from the options given below :

A

$$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{III}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{IV})$$

B

$$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{IV})$$

C

$$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{I})$$

D

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

4

JEE Main 2022 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

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

Assertion (A) : Dissolved substances can be removed from a colloidal solution by diffusion through a parchment paper.

Reason (R) : Particles in a true solution cannot pass through parchment paper but the colloidal particles can pass through the parchment paper.

In the light of the above statements, choose the correct answer from the options given below :

A

Both (A) and (R) are correct and (R) is the correct explanation of (A)

B

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

C

(A) is correct but (R) is not correct

D

(A) is not correct but (R) is correct