Chemistry 9701: HYDROCARBONS Topical Past Paper Questions

Long-chain alkanes from crude oil can be cracked to make alkenes. (a) State the conditions used for the cracking of alkanes. [1] (b) Propene is an alkene that is made by cracking. Alkenes are used in addition to polymerisation. (i) Draw one repeat unit of the addition polymer for…

(a) Describe and explain the shape of benzene. In your answer, include: • the shape and bond angle in the ring • the hybridisation of the carbon atoms • how orbital overlap forms $\sigma$ and $\pi$ bonds between the carbon atoms in the ring. (b) Fig. 5.1 shows two reactions of be…

Chlorine, $ Cl_{2} $, reacts with many elements and compounds to form chlorides. Table 2.1 shows information about some chlorides of Period 3 elements. Table 2.1 (a) Complete Table 2.1. [3] (b) When $ Cl_{2} $ reacts with cold NaOH(aq), $ Cl_{2} $ is both oxidised and reduced. Th…