C2H4  BR2 XKOH/C2H5OH,T0 YAGNO3/NH3 Z HBR Y

Câu 10: Cho sơ đồ : C

2

H

4

 

Br

2

X

KOH

/

C

2

H

5

OH

,

t

0

Y

AgNO

3

/

NH

3

Z 

HBr

Y. Y làA. C

2

H

6

. B. C

2

H

2

. C. C

2

H

5

OH. D. C

2

H

4

.