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The correct IUPAC name of… (Class 12 Chemistry 2025, Q5)

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ChemistryCBSE Class 12 · Board exam 2025, set 56/1/1 · 1 mark · MCQ

CBSE Class 12 Chemistry 2025: question 5

Set in the CBSE Class 12 board exam of 2025, paper 56/1/1, section A, question 5, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q5 · 1 mark · MCQCoordination Compounds

The correct IUPAC name of is

  1. (A)Diamminedichloridoplatinum (II)
  2. (B)Diamminedichloridoplatinum (IV)
  3. (C)Diamminedichloridoplatinum (O)
  4. (D)Diamminedichloridoplatinate (IV)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 56/1/1.

Hints

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

Hint 1

Find the oxidation state of Pt from the overall charge of +2.

Hint 2

In a cationic complex the metal is not given the '-ate' ending.

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. Let the oxidation state of Pt be : , so .

  2. The complex is a cation, so the metal keeps the name platinum. The name is diamminedichloridoplatinum(IV), option (B).

    1 mark

Answer: Diamminedichloridoplatinum(IV), option (B)

Where the marks are

  • Finds Pt = +4 and uses the correct cationic 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 paper2025 board paper, set 56/1/1: 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.