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प्रश्न
Define exothermic reactions. Give two examples of each.
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उत्तर
Exothermic reactions: The chemical reaction in which heat is given out is called exothermic reactions. It causes rise in temperature. .
e.g. (i) When carbon bums in oxygen to form carbon dioxide, a lot of heat is produced.
C + O2 → CO2 + heat.
When water is added to quicklime a lot of heat is produced which boils the water.
CaO + H2O → Ca (OH)2 + Heat.
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संबंधित प्रश्न
Explain the term with examples.
Endothermic reaction
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.
Name a compound which produces carbon dioxide on heating.
State which type of chemical reaction proceeds with evolution of heat energy.
State which type of chemical reaction proceeds with the absorption of heat energy.
Give an example of an endothermic reaction.
Give an example with a balanced equation, of the following reaction:
photochemical reaction
Identify the type of chemical reaction given below:
\[\ce{2KClO3 -> 2KCl + 3O2 ^}\]
Give scientific reasons.
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.
