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Science Chemical Reactions and Equations Class 10 MCQ and Assertion Questions

Short Quiz · Class 10 · Science · CBSE

Preparing for CBSE

Chapter 1 Class 10 - Chemical Reactions and Equations | 5 questions | about 4 minutes

Practise Chemical Reactions and Equations Class 10 with Teachoo's Short Quiz (Class 10 · Science · CBSE). Practise these questions in a free interactive quiz with answer feedback.

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Question 1 of 5
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Question 1 of 5
NCERT Exemplar
The following reaction is used for the preparation of oxygen gas in the laboratory

$$ 2 \mathrm{KClO}_3(\mathrm{~s}) \xrightarrow[\text { Catalyst }]{\text { Heat }} 2 \mathrm{KCl}(\mathrm{~s})+3 \mathrm{O}_2(\mathrm{~g}) $$

Which of the following statement(s) is(are) correct about the reaction?
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Question 2 of 5
Assertion (A): Immersing a clean iron nail into an aqueous solution of copper sulphate causes the intense blue color of the solution to fade to light green.
Reason (R): Copper is chemically more reactive than iron and displaces iron from its sulphate solution.
Blue CuSO₄ + Fe→Green FeSO₄ + Cu
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Question 3 of 5
NCERT Exemplar
Which among the following statement(s) is(are) true?
Exposure of silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride
(ii) sublimation of silver chloride
(iii) decomposition of chlorine gas from silver chloride
(iv) oxidation of silver chloride
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Question 4 of 5
NCERT Exemplar
Which of the following are exothermic processes?
(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
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Question 5 of 5
https://www.teachoo.com/15469/3618/Question-14/category/MCQs-from-NCERT-Exemplar/?r=gn7vw0a361l
Which of the following gases can be used for storage of fresh samples of an oil for a long time?
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