ANSWERS FOR CARBON COMPOUNDS HOMEWORK

1 (a)	But-1-ene                             but-2-ene       2-methylpropene [any two correct structural formula and name]	1+1 1+1
(b) (i)	X :  propanol / propan-1-ol / propan-2-ol Y :  propan-1,2-diol Z :  propane	1 1 1
(ii)	Reaction I   :  C3H6  +  [O]  +  H2O  →  C3H6(OH)2 Reaction II  :  C3H6  +  H2O  →  C3H7OH Reaction III :  C3H6  +  H2  →  C3H8	1 1 1
(c)	1.  Hexene is an unsaturated hydrocarbon while hexane is saturated        hydrocarbon 2.  Hexene has a double bond between carbon and carbon atoms 3.  Hexene undergoes addition reaction when it reacts with bromine      water 4.  Hexane has a single bond between carbon and carbon atoms 5.  Hexane does not undergo addition reaction when it reacts with      bromine water 6.  % of C in hexane, C6H14  = 6(12) x 100 %                                                       86 7.                                           =  83.7 % 8.  % of C in hexene, C6H12  = 6(12)    x 100 %                                                      84 9.                                           =  85.7 % 10. The percentage of carbon atoms in hexene is higher than in hexane	1 1 1 1 1  1 1 1 1 1
	Total	20

2	(a)	(i)	Formula that shows the actual number of atom of each element in a compound/molecule		1
		(ii)	CnH2n+1OH     n=1,2,3……		1
	(b)	(i)	Oxidation		1
		(ii)	Acidified K2Cr2O7 // acidified KMnO4		1
	(c)		[ any TWO correct  isomers]		2
	(d)		1.      Functional  diagram 2.      label: glass wool + butanol, butene gas, heat	1 1	2
	(f)	(i)	Butyl butanoate		1
		(ii)	C3H7COOH + C4H9OH ® C3H7COOC4H9 + H2O 1.      correct formula of reactant 2.      correct formula of product	1 1	2
			TOTAL		11