Chem Alkanes and Alkenes Ws

Secondary 4 Express Pure Chemistry – Alkanes and Alkenes Page 1 of 9 Name : _______________________() Class: _________ Date: _______ 1 Which compound undergoes an addition reaction with bromine? A C2H4 B C 2H6 C C 2H5OH D CH 3CO2H 2 What feature would show that a compound must be an alkene? A if it only contains carbon and hydrogen B if it reacts with bromine C if it is a hydrocarbon with a C=C bond D if it burns in air with a smoky flame 3 A 10 cm3 sample of a gaseous hydrocarbon was completely burnt in oxygen. The total volume of the products was 80 cm3. Which equation represents the combustion of the hydrocarbon? A CH4(g) + 2O2(g)  CO2(g) + 2H2O(g) B 2C2H6(g) + 7O2(g)  4CO2(g) + 6H2O C C3H8(g) + 5O2(g)  3CO2(g) + 4H2O D C4H8(g) + 6O2(g)  4CO2(g) + 4H2O(g) 4 Which compound reacts with steam to produce an alcohol? A butene B ethanoic acid C methane D propane 5 Nonane, the ninth member of alkanes, is present in petrol. What products are formed when nonane is completely burnt in air? A carbon dioxide and hydrogen B carbon monoxide and water C carbon dioxide and water D carbon dioxide, carbon monoxide and water

Secondary 4 Express Pure Chemistry – Alkanes and Alkenes Page 2 of 9 6 Which structural formula represents an unsaturated hydrocarbon? A B C D H H H O H H Cl H C C C C C H C C C O C C H H H H H H H H H H H 7 Which one of these equations does not shown an addition reaction? A CH3Cl + Cl2  CH2Cl2 + HCl B C3H6 + Br2  C3H6Br2 C C4H8 + H2O  C4H9OH D nC2H4  -[-CH2-CH2-]-n 8 What feature would show that a compound must be an alkane? A if it burns in air B if it only contains carbon and hydrogen C if it reacts with chlorine D if it has the general formula CnH(2n + 2) 9 The structures of two compounds are shown below. H H C H H H H H H and H H H H C C C C C H H C C C C H H