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 alcohols into gasoline.
(d) $CO$ is colorless and odourless gas.

• A. (a), (b) and (c) only
• B. (a) and (c) only
• C. (b) and (c) only
• D. (c) and (d) only

Answer 1

Answer: (D)

(c) and (d) only

Answer 2

(1) $CO_2(s)$ (dry ice) [not $CO_2(g)$] is used as refrigerant for ice cream and frozen food.
(2) The structure of $C_{60}$ contains $20$ six carbon rings and $12$ five carbon rings.
(3) $ZSM-5$ (a type of zeolite) is used to convert alcohols directly into gasoline.
(4) $CO(g)$ is colourless and adourless gas