CAPE Chemistry Unit 2 · 2017 · Paper 1 · Question Q2

Items 2-3 refer to the following information about hydrocarbon Z. Hydrocarbon Z has a relative molecular mass of 84. When 0.1\text{ g} of Z was burnt in oxygen, 0.316\text{ g} of carbon dioxide and 0.128\text{ g} of water were formed. The empirical formula of Z is

1. (A)\text{CH}
2. (B)\text{CH}_2
3. (C)\text{CH}_3
4. (D)\text{CH}_2\text{O}