Question

5. Which of the following reaction is not possible?
1) 2H, + 0,2H,0 + Heat
2) 2Na+H, → 2NaH
3) Cu + 2HCl → CuCl + H (9)
4) H,C - CH, + H, H,C- CH, (using Ni as catalyst)​

Answer 1

Answer:

1 is not possible because first I is used then O

Answer 2

Answer:

ANSWER

A reaction in which the same species is both oxidised and reduced is called disproportionation reaction. Assigning the oxidation number on central atom in each molecules by considering oxidation number of H=+1,O=−2 we get oxidation state as:

A.

Cl

2

0

+2OH

−

→

Cl

+1

O

−

+

Cl

−

−1

+H

2

O

Cl gets oxidised and reduced. Its a disproportionation reaction.

B.

Cl

2

0

+2

I

−

−1

→2

Cl

−

−1

+

I

2

0

Cl gets reduced and I gets oxidized

C. 2

Fe

0

+3

H

2

+1

O→

Fe

2

+3

O

3

+3

H

2

0

H gets reduced and Fe gets oxidized

D. 2

H

2

+1

O

−2

+2

F

2

0

→

H

+1

F

−1

+

O

2

0

F gets reduced and O gets oxidized.

Thus, Cl

2

+2OH

−

→ClO

−

Cl

−

+H

2

O is a disproportionation reaction.