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Science Chemical Reactions and Equations Class 10 MCQ Questions

NCERT Exemplar MCQ Quiz · Class 10 · Science · CBSE

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Chapter 1 Class 10 - Chemical Reactions and Equations | 7 questions | about 6 minutes

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

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Question 1 of 7
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Question 1 of 7
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 7
NCERT Exemplar
Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH , anhydrous \(\mathrm{CuSO}_4\) and NaCl were added to the beakers \(\mathrm{A}, \mathrm{B}\) and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B , whereas in case of beaker \(C\), the temperature of the solution falls. Which one of the following statement(s) is(are) correct?
(i) In beakers A and B , an exothermic process has occurred.
(ii) In beakers A and B , an endothermic process has occurred.
(iii) In beaker C exothermic process has occurred.
(iv) In beaker C endothermic process has occurred.
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Question 3 of 7
NCERT Exemplar
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?
(i) Displacement reaction
(ii) Precipitation reaction
(iii) Combination reaction
(iv) Double displacement reaction
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Question 4 of 7
NCERT Exemplar
The following reaction 
\(4 \mathrm{NH}_2(\mathrm{~g})+5 \mathrm{O}_2(\mathrm{~g}) \rightarrow 4 \mathrm{NO}(\mathrm{g})+6 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
is an example of a 
(i) displacement reaction
(ii) combination reaction
(iii) redox reaction
(iv) neutralisation reaction
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Question 5 of 7
NCERT Exemplar
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
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Question 6 of 7
NCERT Exemplar
Which among the following is(are) double displacement reaction(s)?
(i) \(\mathrm{Pb}+\mathrm{CuCl}_2 \rightarrow \mathrm{PbCl}_2+\mathrm{Cu}\)
(ii) \(\mathrm{Na}_2 \mathrm{SO}_4+\mathrm{BaCl}_2 \rightarrow \mathrm{BaSO}_4+2 \mathrm{NaCl}\)
(iii) \(\mathrm{C}+\mathrm{O}_2 \rightarrow \mathrm{CO}_2\)
(iv) \(\mathrm{CH}_4+2 \mathrm{O}_2 \rightarrow \mathrm{CO}_2+2 \mathrm{H}_2 \mathrm{O}\)
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Question 7 of 7
NCERT Exemplar
Which one of the following processes involve chemical reactions?
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