Science true or false.[1 Mark each]

False.
Correct statement:
Catalysts are used to alter the speed of a chemical reaction and increase the reaction rate.

true

False.
Correct statement:
Urea is an important fertilizer in agriculture, but ammonia is the material used for the production of urea.

True.

True.

False.
Correct statement:
The head of a matchstick contains potassium chlorate and antimony tri sulphide.

Light energy may come out due to chemical reactions- False.
Correct statement:
Browning of some vegetables and fruits is due to melanin formation.

CFC is a pollutant- True.

Formation of slaked lime from quicklime is an endothermic reaction- False.
Correct statement:
Formation of slaked limed from quicklime is an exothermic reaction.

Decomposition of lead nitrate is an example for a chemical reaction caused by light- true.

A chemical reaction is a temporary reaction- False.

Correct statement:
A chemical reaction is permanent.