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Hydrocarbons · Question 3

RE-NEET (UG) 2026MCQEasy📈 Topic in 12% papers+4−1
1

Among the following, the compound having conjugated double bonds is

  1. hepta-1,6-diene
  2. hepta-1,3-diene
  3. hepta-1,4-diene
  4. hepta-1,5-diene

Answer

(2) hepta-1,3-diene

Solution

In hepta-1,3-diene (CH2=CH-CH=CH-CH2-CH2-CH3), the two double bonds are separated by a single bond, forming a conjugated system (alternating double and single bonds).

Answer: (2)

RE-NEET (UG) 2026

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2

Consider the following reaction sequences and choose the correct option. [figure]

  1. M and N are stereoisomers
  2. K and L are geometrical isomers
  3. K and L are enantiomers
  4. M and N are geometrical isomers
RE-NEET (UG) 2026
3

Which one of the following reactions does NOT give benzene as the product?

  1. H-C C-H [at 873 K]red hot Iron Tube
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2025
4

Which one of the following compounds does not decolourize bromine water?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2025
5

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

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
NEET (UG) 2024
6

For the given reaction: [figure] 'P' is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2024
7

Baeyer's reagent is :

  1. Acidic potassium permanganate solution
  2. Acidic potassium dichromate solution
  3. Cold, dilute, aqueous solution of potassium permanganate
  4. Hot, concentrated solution of potassium permanganate
RE-NEET (UG) 2024
8

The alkane that can be oxidized to the corresponding alcohol by KMnO4 as per the equation [figure] is, when :

  1. R1 = H; R2 = H; R3 = H
  2. R1 = CH3; R2 = CH3; R3 = CH3
  3. R1 = CH3; R2 = H; R3 = H
  4. R1 = CH3; R2 = CH3; R3 = H
RE-NEET (UG) 2024
9

Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is :

  1. 32
  2. 30
  3. 18
  4. 16
Out of syllabusNEET (UG) 2023
10

Compound X on reaction with O3 followed by Zn/H2O gives formaldehyde and 2-methyl propanal as products. The compound X is

  1. 3-Methylbut-1-ene
  2. 2-Methylbut-1-ene
  3. 2-Methylbut-2-ene
  4. Pent-2-ene
NEET (UG) 2022
11

The decreasing order of boiling points of the following alkanes is : Choose the correct answer from the options given below :

  1. A > E > C > B > D
  2. A > C > E > D > B
  3. C > D > A > E > B
  4. A > E > B > C > D
NEET (UG) 2022 (Phase 2)

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