NTA Abhyas JEE Main2020Chemistrys Block ElementsPractice
H 2 O 2 can not be synthesized by
Options
- AAddition of ice cold H 2 SO 4 on BaO 2
- BAddition of ice cold H 2 SO 4 and PbO 2
- CAerial oxidation of 2 ethyl anthraquinol
- DElectrolysis of (NH 4 ) 2 SO 4 at a high current density
Correct answer
B. Addition of ice cold H 2 SO 4 and PbO 2
Step-by-step solution
(i) BaO 2 (s) + H 2 SO 4 (aq) → BaSO 4 (s) ↓ + H 2 O 2 (aq) (ii) PbO 2 + 2H 2 SO 4 → Pb(SO 4 ) + 2H 2 O PbO 2 + 2H 2 SO 4 → Δ 2PbSO 4 + O 2 + 2H 2 O → Electrolysis of → (NH 4 ) 2 SO 4 (at cathode:- H + and NH 4 + ions attracted → NH 4 + → NH 3 g + H ⊕ 2H + + 2e − → H 2 ) (at anode OH − + SO 4 − 2 ions attracted 4OH − → O 2 + H 2 O 2 + 4e − )