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Carry out the following… (Class 12 Chemistry 2024, Q19a)

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ChemistryCBSE Class 12 · Board exam 2024, set 56/5/1 · 2 marks · Very short answer

CBSE Class 12 Chemistry 2024: question 19(a)

Set in the CBSE Class 12 board exam of 2024, paper 56/5/1, section B, question 19(a), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q19(a) · 2 marks · Very short answerAmines

Carry out the following conversions :

  1. (i)

    Nitrobenzene to Aniline

    1 mark
  2. (ii)

    Aniline to Phenol

    1 mark

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 56/5/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Nitro to amino is a reduction; which metal/acid pair is used?

Hint 2

To replace by , first convert it into a diazonium salt.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. (i) Reduce nitrobenzene with Sn/HCl (or Fe/HCl):

    1 mark

  2. (ii) Diazotise aniline with at 273–278 K, then warm the diazonium salt with water:

    1 mark

Answer: (i) Sn/HCl reduction; (ii) diazotisation followed by warming with water

Where the marks are

  • Correct reduction of nitrobenzene to aniline with reagent (1 mark)
  • Diazotisation of aniline then hydrolysis to phenol (1 mark)

Revise the chapter

  • Chapter: Amines (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Amines, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 56/5/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.