JEE Main 2022 (Online) 28th July Morning Shift | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II.

	List - I		List - II
(A)	$$Cd(s) + 2Ni{(OH)_3}(s) \to CdO(s) + 2Ni{(OH)_2}(s) + {H_2}O(l)$$	(I)	Primary battery
(B)	$$Zn(Hg) + HgO(s) \to ZnO(s) + Hg(l)$$	(II)	Discharging of secondary battery
(C)	$$2PbS{O_4}(s) + 2{H_2}O(l) \to Pb(s) + Pb{O_2}(s) + 2{H_2}S{O_4}(aq)$$	(III)	Fuel cell
(D)	$$2{H_2}(g) + {O_2}(g) \to 2{H_2}O(l)$$	(IV)	Charging of secondary battery

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

2

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?

(A) Rb and Cs

(B) Na and K

(C) Ar and Kr

(D) I and At

Choose the correct answer from the options given below :

A

(A) and (B) only

B

(B) and (C) only

C

(A) and (C) only

D

(C) and (D) only

3

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II, match the gas evolved during each reaction.

	List - I		List - II
(A)	$$\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow}$$	(I)	$$\mathrm{H}_{2}$$
(B)	$$\mathrm{KMnO}_{4}+\mathrm{HCl} \rightarrow$$	(II)	$$\mathrm{N}_{2}$$
(C)	$$\mathrm{Al}+\mathrm{NaOH}+\mathrm{H}_{2} \mathrm{O} \rightarrow$$	(III)	$$\mathrm{O}_{2}$$
(D)	$$\mathrm{NaNO}_{3} \stackrel{\Delta}{\longrightarrow}$$	(IV)	$$\mathrm{Cl}_{2}$$

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

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

C

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

D

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

4

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Which of the following has least tendency to liberate $$\mathrm{H}_{2}$$ from mineral acids?

A

Cu

B

Mn

C

Ni

D

Zn

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