Given below are two statements.
Statement I : Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions.
Statement II : Density of hydrogen peroxide at 298 K is lower than that of D₂ O.
In the light of the above statements, choose the correct answer from the options given below.

Solution

Chemistry ma’am · 4 steps

Test each statement separately: one reaction in acid, one in base, then compare two densities.

1. Oxidizing in acid. In acid, H₂O₂ oxidizes Fe²⁺ to Fe³⁺: 2Fe²⁺ + 2H⁺ + H₂O₂ → 2Fe³⁺ + 2H₂O. It also turns black PbS into white PbSO₄.
2. Oxidizing in base. In base it still oxidizes: 2Fe²⁺ + H₂O₂ → 2Fe³⁺ + 2OH⁻, and Mn²⁺ + H₂O₂ → Mn⁴⁺ + 2OH⁻. So Statement I is true. It can also act as a reducing agent in both media.
3. Compare densities. At 298 K, liquid H₂O₂ has a density of 1.44 g cm⁻³, while D₂O has 1.106 g cm⁻³. Hydrogen peroxide is the denser liquid, so Statement II is false.
4. So. Statement I is true and Statement II is false, which is option (c).

The idea to keep. H₂O₂ is an oxidant and a reductant in both acid and base. For density, remember the order H₂O₂ (1.44) > D₂O (1.106) > H₂O (about 1), in g cm⁻³.

Answer from the NTA final answer key. Solution by PrepWiser.