JEE Main 2021 · 24 Feb · Shift 1 · Chemistry Q35

ChemistrySingle correct+4 / -1Question 35 of 90

(A) $\mathrm{HOCl+H_2O_2\to H_3O^++Cl^-+O_2}$

(B) $\mathrm{I_2+H_2O_2+2OH^-\to2I^-+2H_2O+O_2}$

Choose the correct option.

\mathrm{H_2O_2}

acts as oxidising agent in equations (A) and (B).

\mathrm{H_2O_2}

acts as reducing agent in equations (A) and (B).

\mathrm{H_2O_2}

act as oxidizing and reducing agent respectively in equations (A) and (B).

\mathrm{H_2O_2}

acts as reducing and oxidising agent respectively in equations (A) and (B).

Answer and worked solution

Official answer: B

Oxygen evolved in both: H₂O₂ is oxidised to O₂, reducing HOCl to Cl⁻ in (A) and I₂ to I⁻ in (B). It is the reducing agent in both.

(B)

Topics:Water and hydrogen peroxide Oxidation number

JEE Main 2021 · 24 Feb · Shift 1, Chemistry question 35