When a strip of metallic cobalt is placed in aqueous solution of nickel sulphate, the reaction occurs as

Question

When a strip of metallic cobalt is placed in aqueous solution of nickel sulphate, the reaction occurs as (A) Co 2+(s)+ Ni (a q) longrightarrow Co (a q)+ Ni 2+(s) (B) Co (s)+ Ni 2+(a q) longrightarrow Co (a q)+ Ni (s) (C) Co (s)+ Ni 2+(a q) longrightarrow Co 2+(a q)+ Ni (s) (D) Co 2+(s)+ Ni (a q) longrightarrow Co (a q)+ Ni (s)

Tardigrade Admin · Accepted Answer

Cobalt (Co) being more reactive than nickel, is oxidised to Co 2+ and Ni 2+ ions are reduced to Ni by gaining 2 e-from Co.

Q. When a strip of metallic cobalt is placed in aqueous solution of nickel sulphate, the reaction occurs as

$C o^{2 +} (s) + N i (a q) ⟶ C o (a q) + N i^{2 +} (s)$

$C o (s) + N i^{2 +} (a q) ⟶ C o (a q) + N i (s)$

$C o (s) + N i^{2 +} (a q) ⟶ C o^{2 +} (a q) + N i (s)$

$C o^{2 +} (s) + N i (a q) ⟶ C o (a q) + N i (s)$

Cobalt $(C o)$ being more reactive than nickel, is oxidised to $C o^{2 +}$ and $N i^{2 +}$ ions are reduced to $N i$ by gaining $2 e^{-}$ from $C o$ .

Q. When a strip of metallic cobalt is placed in aqueous solution of nickel sulphate, the reaction occurs as

Co2+(s)+Ni(aq)⟶Co(aq)+Ni2+(s)

Co(s)+Ni2+(aq)⟶Co(aq)+Ni(s)

Co(s)+Ni2+(aq)⟶Co2+(aq)+Ni(s)

Co2+(s)+Ni(aq)⟶Co(aq)+Ni(s)

Cobalt (Co) being more reactive than nickel, is oxidised to Co2+ and Ni2+ ions are reduced to Ni by gaining 2e−from Co.

$C o^{2 +} (s) + N i (a q) ⟶ C o (a q) + N i^{2 +} (s)$

$C o (s) + N i^{2 +} (a q) ⟶ C o (a q) + N i (s)$

$C o (s) + N i^{2 +} (a q) ⟶ C o^{2 +} (a q) + N i (s)$

$C o^{2 +} (s) + N i (a q) ⟶ C o (a q) + N i (s)$

Cobalt $(C o)$ being more reactive than nickel, is oxidised to $C o^{2 +}$ and $N i^{2 +}$ ions are reduced to $N i$ by gaining $2 e^{-}$ from $C o$ .