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

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Question 1 of 5
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Question 1 of 5
NCERT Exemplar
In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?
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Question 2 of 5
NCERT Exemplar
Which of the following are combination reactions?
(i) \(2 \mathrm{KClO}_3 \xrightarrow{\text { Heat }} 2 \mathrm{KCl}+3 \mathrm{O}_2\)
(ii) \(\mathrm{MgO}+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Mg}(\mathrm{OH})_2\)
(iii) \(4 \mathrm{Al}+3 \mathrm{O}_2 \longrightarrow 2 \mathrm{Al}_2 \mathrm{O}_3\)
(iv) \(\mathrm{Zn}+\mathrm{FeSO}_4 \longrightarrow \mathrm{ZnSO}_4+\mathrm{Fe}\)
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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
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 5 of 5
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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