A compound X is bubbled through bromine dissolved in CCl 4 : X → Br 2 / CCl 4 Br - H 2 C - CH 2 - Br Draw the structure of X . State your observation during the reaction.

The given reaction is X → Br 2 / CCl 4 Br - H 2 C - CH 2 - Br . The compound in the given reaction is an alkene. These hydrocarbons undergo an addition reaction with bromine water in carbon tetrachloride solution. Since the reaction gives a product 1 , 2 -dibromoethane, the reactant X is ethene. The structure of X is H 2 C = CH 2 . CH 2 = CH 2 → Br 2 / CCl 4 Br - H 2 C - CH 2 - Br The reaction results in the breaking of double bonds within the compound and bromine gets added to each of the carbon. Bromine solution has a reddish-brown colour which diminishes after the reaction.

Give balanced equation for the following conversion: An alkene to an alkane.

An alkene can be converted to alkane by the hydrogenation reaction in the presence of a catalyst. For example, conversion of ethene into ethane: C 2 H 4 ethene + H 2 → Pt C 2 H 6 ethane

Give balanced equation for the following conversion: An alkene to an alcohol.

An alkene can be converted to alcohol by the hydration reaction in the presence of acids (e.g., sulphuric acid). For example, conversion of ethene into ethyl alcohol: CH 2 = CH 2 + H 2 O → H + C 2 H 5 OH

Give balanced equation for the following conversion: An alkyne to an alkene.

An alkyne can be converted to alkene by the hydrogenation reaction in the presence of a catalyst. For example, conversion of ethyne into ethene: C 2 H 2 ethyne + H 2 → Pt C 2 H 4 ethene