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The complex [Co(NH_3)_5(NO_… (Class 12 Chemistry 2023, Q21b)

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ChemistryCBSE Class 12 · Board exam 2023, set 56/5/1 · 2 marks · Very short answer

CBSE Class 12 Chemistry 2023: question 21(b)

Set in the CBSE Class 12 board exam of 2023, paper 56/5/1, section B, question 21(b), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q21(b) · 2 marks · Very short answerCoordination Compounds

The complex is red in colour. Give IUPAC name of its linkage isomer.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 56/5/1.

Hints

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

Hint 1

Linkage isomerism arises with ambidentate ligands.

Hint 2

can coordinate through N or through O; switch the donor atom and name it.

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. is an ambidentate ligand: it can bind through N (nitrito-N) or through O (nitrito-O, –ONO). In the given formula it is written as N-bonded , so the linkage isomer has the ligand bonded through oxygen: .

    1 mark

  2. IUPAC name of the linkage isomer: Pentaamminenitrito-O-cobalt(III) chloride.

    1 mark

Answer: Pentaamminenitrito-O-cobalt(III) chloride,

Where the marks are

  • Recognises ambidentate and writes O-bonded isomer (1 mark)
  • Correct IUPAC name (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Coordination Compounds, one at a time, marked against the answer key and marking points.Back to the full paper2023 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.