Skip to content

Which solution has… (Class 12 Chemistry SQP 2026-27, Q12)

questionbuddy.in/q/cbse-12-chemistry-2026-27-sqp-q12-solution-highest-conductivity

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

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

From the official CBSE sample question paper for 2026-27, section A, question 12, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q12 · 1 mark · MCQElectrochemistry

Which solution has the highest conductivity?

  1. (A)0.1 M HCl
  2. (B)0.1 M
  3. (C)0.1 M glucose
  4. (D)0.1 M

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

Conductivity depends on the number of ions present.

Hint 2

Classify each solute as a strong, weak or non-electrolyte.

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. HCl is a strong electrolyte and is completely ionised, so at the same concentration it gives the most ions.

  2. and are weak electrolytes and only partly ionised. Glucose is a non-electrolyte and gives no ions. So 0.1 M HCl conducts best.

    1 mark

Answer: Option (A) 0.1 M HCl

Where the marks are

  • Strong electrolyte HCl, fully ionised, gives the highest conductivity (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 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.