Identify the correct statements among the following:
a. | CO2 (g) is used as a refrigerant for ice-cream and frozen food. |
b. | The structure of C60 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 colourless and odourless gas |
1. (a) and (c) only
2. (b) and (c) only
3. (c) and (d) only
4. (a), (b) and (c) only