Chemistry 9701: CHEMICAL BONDING Topical Past Paper Questions

(a) (i) Nitrogen, $ N_{2} $, contains sigma ( $ \sigma $) and pi ( $ \pi $) bonds. Describe how a pi ( $ \pi $) bond is formed. [2] (ii) Explain the lack of reactivity of nitrogen. [2] (b) Nitrogen is used to manufacture ammonia, NH_{3}, in the Haber process. An iron catalyst is…

Ethanol, CH_{3}CHO, reacts with nitrogen dioxide, NO_{2}. The products of the first step of this reaction are a CH_{3}\overset{\cdot\cdot}{C}=O radical and a molecule of nitrous acid, HNO_{2}. $$ \mathrm{CH}_{3}\mathrm{CHO}+\mathrm{NO}_{2}\rightarrow\mathrm{CH}_{3}\overset{\bulle…

Nitrogen, $ N_{2} $, is generally an unreactive molecule but it does react under certain conditions. (a) Give two reasons to explain the lack of reactivity of nitrogen. (b) $\mathrm{N}_{2}$ can react with oxygen in an internal combustion engine to form a mixture of NO and $\mathr…