JEE Main 2025 (Online) 7th April Evening Shift | Practical Organic Chemistry Question 1 | Chemistry

1

JEE Main 2025 (Online) 7th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

A mixture of 1 g each of chlorobenzene, aniline, and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel. 5 M NaOH (30 mL) was added in the same funnel. The funnel was shaken vigorously and then kept aside. The ethyl acetate layer in the funnel contains :

A

chlorobenzene and aniline

B

benzoic acid and aniline

C

benzoic acid

D

benzoic acid and chlorobenzene

2

JEE Main 2025 (Online) 4th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II

	List - I (Separation of)		List - II (Separation Technique)
(A)	Aniline from aniline-water mixture	(I)	Simple distillation
(B)	Glycerol from spent-lye in soap industry	(II)	Fractional distillation
(C)	Different fractions of crude oil in petroleum industry	(III)	Distillation at reduced pressure
(D)	Chloroform-Aniline mixture	(IV)	Steam distillation

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

3

JEE Main 2025 (Online) 4th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

A toxic compound " A " when reacted with NaCN in aqueous acidic medium yields an edible cooking component and food preservative " B ". " B " is converted to " C " by diborane and can be used as an additive to petrol to reduce emission. "C" upon reaction with oleum at $140^{\circ} \mathrm{C}$ yields an inhalable anesthetic " D ". Identify " A ", " B ", " C " & " D ", respectively :

A

Methanol; acetic acid; ethanol; diethyl ether

B

Ethanol; acetonitrile; ethylamine; ethylene

C

Methanol; formaldehyde; methyl chloride; chloroform

D

Acetaldehyde; 2-hydroxypropanoic acid; propanoic acid; dipropyl ether

4

JEE Main 2025 (Online) 2nd April Evening Shift

MCQ (Single Correct Answer)

+4

-1

In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at $300 \mathrm{~K}=15 \mathrm{~mm} \mathrm{Hg}$ ) is___________%.

A

20.87

B

12.57

C

1.257

D

18.67