Question

Identify the correct statements from the following :
a) $$CO_2(g)$$ is used as refrigerant for ice-cream and frozen food.
b) The structure of $$C_{60}$$ contains twelve six-carbon rings and twenty-five carbon rings.
c) $$ZSM-5$$, a type of zeolite, is used to convert alcohol into gasoline.
d) $$CO$$ is a colorless and odourless gas

Answer 1

Correct option is C. (c) and (d) only

a) $$CO_2$$ in solid state used as refrigerant for ice-cream and frozen food because of its sublimation properties. Sublimation is a process in which a solid directly goes into gaseous state without going into liquid state.

b) The structure of $$C_{60}$$ contains twelve five-carbon rings and twenty six-carbon rings. Hence the given statement was wrong.

c) $$ZSM-5$$, a type of zeolite, is used to convert alcohol into gasoline. The statement is correct.

d) $$CO$$ is a colorless and odourless gas. True.

Statements (c) and (d) are correct.
Option C is correct.