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प्रश्न
Respiration is a ______ change.
उत्तर
Respiration is a exothermic chemical change.
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संबंधित प्रश्न
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In a................ reaction heat energy is absorbed.
Give an example of the following chemical changes.
A reaction involving blue solution.
State the effects of endothermic and exothermic reactions on the surroundings.
Name a carbonate which do not decompose on heating.
What do you observe? When
Lead nitrate is heated.
Define exothermic and endothermic changes. Give two example in each case.
State the following reaction whether heat is evolved or absorbed –
water is added to quicklime
State the following reaction whether heat is evolved or absorbed –
Two neutral gases combine to give a basic gas.
Give a scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
