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Subjects
Science State Board
Class 7
Changes around us
Chemical changes
5.
Exothermic and endothermic changes
Exercise condition:
4
m.
Choose the correct answers:
1
.
Freezing is an example of exothermic __________ change.
Combustion
Freezing
2
.
The \(ΔH\) is __________ in endothermic reaction.
Positive
Negative
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