Which of the following chemical reactions depicts the oxidizing behaviour of H2SO4 ?

A
$\begin{aligned} 2 {PCl}_{5} + H_{2} {SO}_{4} \to 2 {POCl}_{3} + 2 HCl + {SO}_{2} {Cl}_{2} \end{aligned}$
B
$\begin{aligned} 2 Hl + H_{2} {SO}_{4} \to 1_{2} + {SO}_{2} + 2 H_{2} O \end{aligned}$
C
$\begin{aligned} Ca (OH)_{2} + H_{2} {SO}_{4} \to {CaSO}_{4} + 2 H_{2} O \end{aligned}$
D
$\begin{aligned} NaCl + H_{2} {SO}_{4} \to {NaHSO}_{4} + HCl \end{aligned}$

Solution:

The oxidizing behaviour of $H_{2} {SO}_{4}$ implies a decrease in oxidation number of S. In $H_{2} {SO}_{4}, {SO}_{2} {Cl}_{2}, {SO}_{4}^{2 -}$ and ${NaHSO}_{4}$ , it is +6 while in ${SO}_{2}$ it is +4.

The oxidation number, sometimes referred to as the oxidation state, is the total number of electrons that an atom gains or loses in the process of joining with another atom to form a chemical bond.

Which of the following chemical reactions depicts the oxidizing behaviour of $H_{2} {SO}_{4}$ ?

Solution:

Related content