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

Identify the incorrect statement from the following.

A

A circular path around the nucleus in which an electron moves is proposed as Bohr's orbit.

B

An orbital is the one electron wave function $$(\psi)$$ in an atom.

C

The existence of Bohr's orbits is supported by hydrogen spectrum.

D

Atomic orbital is characterised by the quantum numbers $$\mathrm{n}$$ and $$l$$ only.

2

JEE Main 2022 (Online) 28th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Which of the following relation is not correct?

A

$$\Delta \mathrm{H}=\Delta \mathrm{U}-\mathrm{P} \Delta \mathrm{V}$$

B

$$\Delta \mathrm{U}=\mathrm{q}+\mathrm{W}$$

C

$$\Delta \mathrm{S}_{\text {sys }}+\Delta \mathrm{S}_{\text {surr }} \geqslant 0$$

D

$$\Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T} \Delta \mathrm{S}$$

3

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

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

4

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

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