The pBlock Elements - Result Question 13
####14. Identify the correct statements from the following :
[2020]
(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) and (C) only
(b) (B) and (C) only
(c) (C) and (D) only
(d) (A), (B) and (C) only
Show Answer
Solution:
- (c)
A. Dry ice, $CO_2(s)$, is used as refrigerant B. $C _{60}$ contains 20 six membered rings, 12 five membered rings
Zeolites are crystalline, 3D aluminosilicates. ZSM5 contain two sets of perpendicular, intersecting channel, one is 10 membered another is 8 membered.
