JEE Main 2023 (Online) 29th January Morning Shift | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

The bond dissociation energy is highest for

A

Cl$$_2$$

B

I$$_2$$

C

Br$$_2$$

D

F$$_2$$

2

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Number of cyclic tripeptides formed with 2 amino acids A and B is :

A

2

B

3

C

5

D

4

3

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

The shortest wavelength of hydrogen atom in Lyman series is $$\lambda$$. The longest wavelength is Balmer series of He$$^+$$ is

A

$$\frac{36\lambda}{5}$$

B

$$\frac{5}{9\lambda}$$

C

$$\frac{9\lambda}{5}$$

D

$$\frac{5\lambda}{9}$$

4

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	List I		List II
	Reaction		Reagents
(A)	Hoffmann Degradation	(I)	$$\mathrm{Conc. KOH}$$, $$\Delta$$
(B)	Clemenson reduction	(II)	$$\mathrm{CHCl_3,NaOH/H_3O}$$$$^ \oplus $$
(C)	Cannizaro reaction	(III)	$$\mathrm{Br_2,NaOH}$$
(D)	Reimer-Tiemann Reaction	(IV)	$$\mathrm{Zn-Hg/HCl}$$

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

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