What do you undestand by exothermic reaction and endothermic reaction? Give one example of each type.

What do you understand by chemical reaction ?

In endothermic reactions,

For an exothermic reaction

What does one mean by exothermic and endothermic reactions? Give examples

Define : Photochemical reaction Give one example.

What do you understand by exothermic and endothermic reactions ? How are they related to the change in enthalpy?

Define : Electrochemical reaction Give one example.

What do you understand by the exchange reactions of heavy water ? Give some examples.

What do you understand by a redox reaction ? Give an example.

What do you understand by nitration ? Give an example.