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Chemical Changes and Reaction CHEMISTRY - Chemical Changes and Reaction

ICSE - STD 9 - CHEMISTRY (ICSE - English Medium). 42 questions in this chapter.

Question types

Chemical Changes and Reaction question types

42 questions across 4 question groups — pick any mix to generate a CHEMISTRY paper with step-by-step answer keys.

42
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4
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5
Question types
Sample Questions

Chemical Changes and Reaction questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 3Do as Directed.1 Mark
Classify the reactions.
$2 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow$ Electric current $2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$
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Q 4Do as Directed.1 Mark
Classify the reactions.
$3 \mathrm{Fe}(\mathrm{s})+4 \mathrm{H}_2 \mathrm{O}($ steam $) \rightleftharpoons \mathrm{Fe}_3 \mathrm{O}_4(\mathrm{~s})+4 \mathrm{H}_2$ (g)
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Q 15[2 Mark Question Answer]2 Marks
what do you understand by the term thermal dissociation? How thermal dissociation is different from thermal decomposition? Write two fully balanced equations for thermal dissociation reactions.
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