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Amines · Question 2

JEE Main 2026 (Online) 6th April Morning ShiftMCQEasy📈 Topic in 3% papers+4−1
1

Arrange the following compounds according to increasing order of boiling points. n-C4H9OH (A), n-C4H9NH2 (B), n- C4H10 (C) and C2H5NHC2H5 (D).

  1. C < B < A < D
  2. D < C < B < A
  3. C < D < B < A
  4. D < B < A < C

Answer

(3) C < D < B < A

Solution

Molar masses are close (74, 73, 58, 73 g mol-1), so boiling point is decided by intermolecular hydrogen bonding.

n- C4H10 (C): non-polar, only weak van der Waals forces ⇒ lowest

C2H5NHC2H5 (D): 2° amine, one N–H per molecule ⇒ weak H-bonding

n-C4H9NH2 (B): 1° amine, two N–H per molecule ⇒ more extensive H-bonding

n-C4H9OH (A): O is more electronegative than N ⇒ O–H···O bonds are stronger than N–H···N ⇒ highest

∴ C < D < B < A

Answer: (3)

JEE Main 2026 (Online) 6th April Morning Shift

Keep practising — Amines

2

Consider the following sequence of reactions. [figure] The percentage of nitrogen in the yellow product (X) formed is %. (Nearest Integer) (Given Molar mass in g mol-1 H : 1, C : 12, N : 14)

JEE Main 2026 (Online) 6th April Morning Shift
3

Consider the following organic reaction sequence. Choose the final product (X) from the following (consider the major product in all intermediate reactions) [figure]

  1. Benzene
  2. Phenol
  3. Propanol
  4. Chlorobenzene
JEE Main 2026 (Online) 6th April Evening Shift
4

The number of compounds from the following which can undergo reaction with Br2/KOH (alcoholic) to give respective products and these respective products can also be obtained separately by Gabriel phthalimide reaction is : [figure]

  1. 5
  2. 4
  3. 3
  4. 6
JEE Main 2026 (Online) 6th April Evening Shift
5

Benzyl isocyanide can be obtained from Choose the correct answer from the options given below :

  1. A and B Only
  2. A and C Only
  3. B and D Only
  4. D and E Only
JEE Main 2026 (Online) 5th April Morning Shift
6

Identify the incorrect statements. Choose the correct answer from the options given below:

  1. A and D Only
  2. A and C Only
  3. B and C Only
  4. A and B Only
JEE Main 2026 (Online) 5th April Morning Shift
7

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 5th April Evening Shift
8

Product C of the following reaction sequence will be [figure]

  1. 1-Bromo-4-nitrobenzene
  2. 1, 3, 5-Tribromo-2-nitrobenzene
  3. 4-Bromo-1-nitrobenzene
  4. 1, 3, 5-Tribromobenzene
JEE Main 2026 (Online) 4th April Morning Shift
9

For the given molecule, "x", the preferred site for the attack of the electrophile is : [figure]

  1. Predominantly at "r"
  2. "r" and "u"
  3. "p" and "s"
  4. Predominantly at "u"
JEE Main 2026 (Online) 2nd April Morning Shift
10

Consider the three aromatic molecules (P, Q and R) whose structures have been given below : [figure] The correct order regarding the reactivity of these compounds with Ph- N N Cl under optimum but slightly acidic medium is :

  1. P > Q > R
  2. R > P > Q
  3. R > Q > P
  4. P > R > Q
JEE Main 2026 (Online) 2nd April Morning Shift
11

Identify compounds A and E in the following reaction sequence. [figure]

  1. A = [figure] E = [figure]
  2. A = [figure] E = [figure]
  3. A = [figure] E = [figure]
  4. A = [figure] E = [figure]
JEE Main 2026 (Online) 2nd April Evening Shift

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