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Hydrocarbons · Question 58

AIPMT 2000MCQEasy📈 Topic in 12% papers+4−1
1

In Friedel-Crafts reaction, toluene can be prepared by

  1. C6H6 + CH3Cl
  2. C6H5Cl + CH4
  3. C6H6 + CH2Cl2
  4. C6H6 + CH3COCl

Answer

(1) C6H6 + CH3Cl

Solution

As per NCERT, Friedel-Crafts alkylation: benzene reacts with an alkyl halide in the presence of anhydrous AlCl3 to give an alkylbenzene.

C6H6 + CH3Cl anhyd. AlCl3 C6H5CH3 + HCl

(2) An aryl halide and methane do not give this reaction.

(3) CH2Cl2 gives diphenylmethane, not toluene.

(4) CH3COCl gives acetophenone (Friedel-Crafts acylation).

Answer: (1)

AIPMT 2000

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2

The number of chlorine atoms present in the organic products X and Y of the following reactions, respectively are : [figure]

  1. 3 and 3
  2. 6 and 6
  3. 6 and 3
  4. 3 and 6
NEET (UG) 2026
3

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
RE-NEET (UG) 2026
4

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
RE-NEET (UG) 2026
5

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
6

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
7

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2025
8

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
9

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2024
10

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
11

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

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