JEE Main20231 Feb 2023Evening ShiftChemistryHydrogenActual
The starting material for convenient preparation of deuterated hydrogen peroxide D 2 O 2 in laboratory is:
Options
- AK 2   S 2 O 8
- B2 -ethylanthraquinol
- CBaO 2
- DBaO
Correct answer
A. K 2   S 2 O 8
Step-by-step solution
Peroxodisulphate, obtained by electrolytic oxidation of acidified sulphate solutions at high current density, on hydrolysis yields hydrogen peroxide. 2 HSO 4 -   ( aq )   → Electrolysis   HO 3 SOOSO 3 H   ( aq )   → Electrolysis   2 HSO 4 -   ( aq )   +   2 H +   ( aq )   +   H 2 O 2   ( aq ) This method is now used for the laboratory preparation of D 2 O 2 . K 2   S 2 O 8   ( s ) + 2 D 2 O   ( l ) → 2 KDSO 4   (