Question

C2H2->CH3COH -> CH3-CH2OH ->CH3-CH2OH ->CH3-CH2Br -> CH4 -> CH3-CH2OH -> CH3-COH

Answer 1

1)C2H2+H2O->CH3COH 

2)CH3COH+H2->CH3-CH2OH 

3)CH3-CH2OH+HBr->CH3-CH2Br+H2O 

4)CH3-CH2Br->C2H4+HBr

5)C2H4+H2O->CH3-CH2OH 

6)CH3-CH2OH->CH3COH+H2