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Hydrocarbons

JEE Main 2026 (Online) 28th January Evening ShiftMCQMedium📈 Topic in 14% papers+4−1
Ques. 1JEE Main 2026, 28 January (Evening Shift)

The reactions which produce alcohol as the product are : Choose the correct answer from the options given below :

  1. B, D and E Only
  2. A and D Only
  3. A, C and E Only
  4. C and D Only

Answer

(4) C and D Only

Solution

A. CH4 + O2 Mo2O3, HCHO + H2O (aldehyde)

B. 2CH3CH3 + 3O2 (CH3COO)2Mn, 2CH3COOH + 2H2O (acid)

C. (CH3)3CH KMnO4 (CH3)3C-OH (2-methylpropan-2-ol, an alcohol)

D. 2CH4 + O2 Cu/523 K/100 atm 2CH3OH (methanol, an alcohol)

E. CH3-CH=CH-CH3 KMnO4/H+ 2CH3COOH (acid)

(As per NCERT, controlled oxidation of alkanes.)

C and D only

Answer: (4)

Keep practising — Hydrocarbons

Ques. 2JEE Main 2026, 23 January (Morning Shift)

Consider the following compounds : [figure] Arrange these compounds in the increasing order of reactivity with nitrating mixture.

  1. c < b < a
  2. b < c < a
  3. c < a < b
  4. b < a < c
Ques. 3JEE Main 2026, 23 January (Morning Shift)

But-2-yne and hydrogen (one mole each) are separately treated with (i) Pd/C and (ii) Na/ liq. NH3 to give the products X and Y respectively. [figure] Identify the incorrect statements. Choose the correct answer from the options given below :

  1. B and D Only
  2. A and C Only
  3. A and B Only
  4. B and C Only
Ques. 4JEE Main 2026, 23 January (Evening Shift)

[figure] Identify (P)

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2026, 22 January (Morning Shift)

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

  1. Statement I is incorrect but Statement II is correct
  2. Both Statement I and Statement II are correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect
Ques. 6JEE Main 2026, 22 January (Morning Shift)

The cycloalkene (X) on bromination consumes one mole of bromine per mole of (X) and gives the product (Y) in which C : Br ratio is 3:1. The percentage of bromine in the product (Y) is %. (Nearest integer) (Given : molar mass in g mol-1 H : 1, C : 12, O : 16, Br : 80)

Ques. 7JEE Main 2026, 22 January (Evening Shift)

Consider the following reaction : [figure] The product Y formed is :

  1. 2-methylhex-3-yne
  2. 5-methylhex-2-yne
  3. Isopropylbut-1-yne
  4. 2-methylhex-2-yne
Ques. 8JEE Main 2026, 22 January (Evening Shift)

The dibromo compound [P] (molecular formula: C9H10Br2) when heated with excess sodamide followed by treatment with dilute HCl gives [Q]. On warming [Q] with mercuric sulphate and dilute sulphuric acid yields [R] which gives positive Iodoform test but negative Tollens' test. The compound [P] is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9JEE Main 2026, 21 January (Morning Shift)

Identify A in the following reaction. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10JEE Main 2025, 8 April (Evening Shift)

[figure] 'P' is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11JEE Main 2025, 8 April (Evening Shift)

Choose the correct set of reagents for the following conversion. [figure]

  1. Cl2/ anhy. AlCl3; Br2/Fe; alc. KOH
  2. Cl2/Fe; Br2/ anhy. AlCl3; aq. KOH
  3. Br2/Fe; Cl2, ; alc. KOH
  4. Br2/ anhy. AlCl3; Cl2, ; aq. KOH

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