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
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