Which of the following options clearly describes both the reactions? (i) AgNO 3 + NaCl → NaNO 3 + AgCl (ii) K 2 SO 4 + BaCl 2 → BaSO 4 + 2KCl (A) (i) is double displacement, (ii) is displacement reaction. (B) Both, (i) and (ii) are displacement reactions and precipitation reactions. (C) Both, (i) and (ii) are double displacement reactions and precipitation reactions. (D) (i) is displacement, (ii) is double displacement reaction.

ScienceCBSE Class 10 · Board exam 2026, set 31/1/1 · 1 mark · MCQ

CBSE Class 10 Science 2026: question 17

Set in the CBSE Class 10 board exam of 2026, paper 31/1/1, section B, question 17, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q17 · 1 mark · MCQChemical Reactions and Equations

Which of the following options clearly describes both the reactions?
(i) AgNO₃ + NaCl → NaNO₃ + AgCl
(ii) K₂SO₄ + BaCl₂ → BaSO₄ + 2KCl

(A)(i) is double displacement, (ii) is displacement reaction.
(B)Both, (i) and (ii) are displacement reactions and precipitation reactions.
(C)Both, (i) and (ii) are double displacement reactions and precipitation reactions.
(D)(i) is displacement, (ii) is double displacement reaction.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/1/1.

Hints

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

Hint 1

Check whether ions are exchanged between two compounds.

Hint 2

Are AgCl and BaSO₄ soluble in water?

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.

In both reactions two compounds exchange their ions:
(i) $AgNO_{3} + NaCl \to NaNO_{3} + AgCl$
(ii) $K_{2} SO_{4} + BaCl_{2} \to BaSO_{4} + 2 KCl$
So both are double displacement reactions.
Each reaction forms an insoluble product: white $AgCl$ in (i) and white $BaSO_{4}$ in (ii). So both are also precipitation reactions. Correct option: (C).
1 mark

Answer: (C) Both are double displacement and precipitation reactions.

Where the marks are

Chooses (C) (1 mark)

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Chapter: Chemical Reactions and Equations (notes, formulas, where marks are lost and every past question)

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CBSE Class 10 Science 2026: question 17

Hints

Step-by-step solution

Revise the chapter

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