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Assertion (A)… (Class 12 Chemistry SQP 2026-27, Q14)

questionbuddy.in/q/cbse-12-chemistry-2026-27-sqp-q14-permanganate-manganate-ions-tetrahedral-structure

ChemistryCBSE Class 12 · Sample paper, session 2026-27 · 1 mark · Assertion-reason

CBSE Class 12 Chemistry sample paper 2026-27: question 14

From the official CBSE sample question paper for 2026-27, section A, question 14, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q14 · 1 mark · Assertion-reasonCompetency-basedThe d- and f-Block Elements

Assertion (A): Permanganate and manganate ions have tetrahedral structure
Reason (R): In permanganate and manganate ions, pi bonding takes place which is due to overlap of p orbitals of oxygen with p orbitals of manganese.

Select the most appropriate answer from the options given below:

  1. (A)Both A and R are true, and R is the correct explanation of A.
  2. (B)Both A and R are true, and R is not the correct explanation of A.
  3. (C)A is true but R is false.
  4. (D)A is false but R is true.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2026-27.

Hints

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

Hint 1

Recall the shape of the permanganate ion.

Hint 2

Ask which orbitals of Mn are used in π bonding.

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. A is true: both and are tetrahedral.

  2. R is false: the π bonding in these ions arises from overlap of oxygen p orbitals with manganese d orbitals, not p orbitals. So the answer is C.

    1 mark

Answer: Option (C)

Where the marks are

  • A true; R false because π bonding is p(O)–d(Mn) (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from The d- and f-Block Elements, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2026-27: 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.