The purpose of a generator is to convert: A. electrical energy to mechanical energy.
B. mechanical energy to electrical energy.
C. chemical energy to nuclear energy.
D. mechanical energy to chemical energy.

b (mechanical energy to electrical energy)

because mechanical energy is the generator. And it's majority is to convert mechanical energy to electrical energy

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).