Skip to content

Assertion (A)… (Class 12 Chemistry SQP 2025-26, Q16)

questionbuddy.in/q/cbse-12-chemistry-2025-26-sqp-q16-secondary-cells-used-invertors-primary

ChemistryCBSE Class 12 · Sample paper, session 2025-26 · 1 mark · Assertion-reason

CBSE Class 12 Chemistry sample paper 2025-26: question 16

From the official CBSE sample question paper for 2025-26, section A, question 16, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q16 · 1 mark · Assertion-reasonCompetency-basedElectrochemistry

Assertion (A): Secondary cells are used in invertors.
Reason (R): A primary cell can be recharged by passing current through it in the opposite direction after it has been used.

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 2025-26.

Hints

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

Hint 1

Which type of cell can be recharged?

Hint 2

Recall the example of a dry cell.

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: inverters use rechargeable (secondary) cells such as lead storage batteries.

  2. R is false: a primary cell cannot be recharged once used; only secondary cells can be.

    1 mark

Answer: Option (C)

Where the marks are

  • A true, R false (1 mark)

Revise the chapter

  • Chapter: Electrochemistry (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Electrochemistry, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2025-26: 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.