JEE Main 2023 (Online) 24th January Morning Shift | Surface Chemistry Question 26 | Chemistry

1

JEE Main 2023 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Statement I : For colloidal particles, the values of colligative properties are of small order as compared to values shown by true solutions at same concentration.

Statement II : For colloidal particles, the potential difference between the fixed layer and the diffused layer of same charges is called the electrokinetic potential or zeta potential.

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

A

Both Statement I and Statement II are false

B

Statement I is true and Statement II is false

C

Both Statement I and Statement II are true

D

Statement I is false but Statement II is true

2

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$$_3$$

3

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

4

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)