Of the following reactions, only one is a redox reaction. Identify it

Question

Of the following reactions, only one is a redox reaction. Identify it (A) Ca ( OH )2+2 HCl longrightarrow CaCl 2+2 H 2 O (B) BaCl 2+ MgSO 4 longrightarrow BaSO 4+ MgCl 2 (C) 2 S 2 O 72-+2 H 2 O longrightarrow 4 SO 42-+4 H + (D) Cu 2 S +2 FeO longrightarrow 2 Cu +2 Fe + SO 2

Tardigrade Admin · Accepted Answer

In redox reactions oxidation and reduction take place side by side. Cu2S + 2FeO arrow 2Cu + 2Fe + SO2 O.N. of Cu changes from +1 to 0 (reduction) and O.N. of S changes from -2 to +4 (oxidation).

Q. Of the following reactions, only one is a redox reaction. Identify it

$C a (O H)_{2} + 2 H Cl ⟶ C a C l_{2} + 2 H_{2} O$

$B a C l_{2} + M g S O_{4} ⟶ B a S O_{4} + M g C l_{2}$

$2 S_{2} O_{7}^{2 -} + 2 H_{2} O ⟶ 4 S O_{4}^{2 -} + 4 H^{+}$

$C u_{2} S + 2 F e O ⟶ 2 C u + 2 F e + S O_{2}$

In redox reactions oxidation and reduction take place side by side.
$C u_{2} S + 2 F e O \to 2 C u + 2 F e + S O_{2}$
O.N. of $C u$ changes from $+ 1$ to 0 (reduction) and O.N. of $S$ changes from $- 2$ to $+ 4$ (oxidation).

Q. Of the following reactions, only one is a redox reaction. Identify it

Ca(OH)2​+2HCl⟶CaCl2​+2H2​O

BaCl2​+MgSO4​⟶BaSO4​+MgCl2​

2S2​O72−​+2H2​O⟶4SO42−​+4H+

Cu2​S+2FeO⟶2Cu+2Fe+SO2​

In redox reactions oxidation and reduction take place side by side. Cu2​S+2FeO→2Cu+2Fe+SO2​ O.N. of Cu changes from +1 to 0 (reduction) and O.N. of S changes from −2 to +4 (oxidation).

$C a (O H)_{2} + 2 H Cl ⟶ C a C l_{2} + 2 H_{2} O$

$B a C l_{2} + M g S O_{4} ⟶ B a S O_{4} + M g C l_{2}$

$2 S_{2} O_{7}^{2 -} + 2 H_{2} O ⟶ 4 S O_{4}^{2 -} + 4 H^{+}$

$C u_{2} S + 2 F e O ⟶ 2 C u + 2 F e + S O_{2}$

In redox reactions oxidation and reduction take place side by side.
$C u_{2} S + 2 F e O \to 2 C u + 2 F e + S O_{2}$
O.N. of $C u$ changes from $+ 1$ to 0 (reduction) and O.N. of $S$ changes from $- 2$ to $+ 4$ (oxidation).