CAC2 H O2  C2H2 H O2  CH3CHO  O2/MN2,T0 CH3C...

Câu 28:

CaC

2



H O

2

 C

2

H

2



H O

2

 CH

3

CHO  

O

2

/

Mn

2

,

t

0

 CH

3

COOH