Question

what is photochemical reaction and dark chemical reaction.?​

Answer 1

Answer:

photochemical reaction is a chemical reaction which is initiated by the absorption of energy  in the form of light ; where as dark chemical reactions are the reactions which make use of organic energy molecules.

Explanation:

Answer 2

PHOTOCHEMICAL REACTION:

Some reactions do not take place in dark but take place in presence of light or some other radiation.Such reactions are known as photochemical reaction.

EXAMPLE:

H²(g)+Cl²(g)+hv --->2Hcl(g)

DARK CHEMICAL REACTION:

Any series of chemical reaction in photosynthesis not requiring the presence light and involving the reduction of carbon dioxide to form carbohydrate is known as dark chemical reaction.