Question

(a) Write an equation for the laboratory preparation of
(i) an unsaturated hydrocarbon from calcium carbide. (ii) an alcohol from ethyl bromide.
(b) What would you see, when ethyne is bubbled through a solution of bromine in carbon tetrachloride ?
(c) Name the addition product formed between ethene and water.

Answer 1

(a) i) $Ca{C}_2+2H_{2}O\to Ca(OH{)}_2+C_2{H}_2$

ii) $C_2{H}_{5}Br+KO{H}_{(}aq)\to C_2{H}_{5}OH+HCl$

(b) When bromine in carbon tetrachloride is added to ethyne , the orange color of the bromine disappears due to the formation of the colorless ethylene bromide.

(c) Ethanol $C_2{H}_{2}OH$