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Chemistry CBSE Live product
Class 10 (2026-27)
Chemical reactions and equations
Revision I - Chemical reactions and equations
7.
Identification of chemical reaction
Question:
2
m.
Read the following question and answer:
Identification of chemical reaction
i.
Which observation indicates that gas is being produced?
Formation of bubbles
Colour change
Solid disappears
Conical flask feels hot
ii.
The reaction between zinc and hydrochloric acid is:
Endothermic reaction
Exothermic reaction
Freezing of metal
Neutralisation reaction
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