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Chemistry CBSE Live product
Class 10 (2026-27)
Chemical reactions and equations
Introduction to chemical reactions and balancing equations
2.
Characteristics of chemical reaction
Question:
1
m.
Identify the correct answer:
When quicklime (\(CaO\)) is added to water, a hissing sound is heard and the beaker becomes hot. What does this observation indicate?
Exothermic reaction and formation of a new compound
Endothermic reaction and gas evolution
Physical change
Cooling due to evaporation
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