C3H8------(Ni. t)---C3H6+H2
CH2=CH-CH3+H2O-----CH3-CH (OH)-CH3
CH3-CH (OH)-CH3 ----CH3 -CO-CH3 +H2
CH3 -CO-CH3 +H2 ----CH3-CH (OH)-CH3
CH3-CH (OH)-CH3+HBr=CH3-CH(Br)-CH3+H2O
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