Which of the following set is having correct statements? 1 . H 2 O 2 is a weak base 2 . H 2 O 2 oxidizes Fe (II) to Fe (III) 3 . H 2 O 2 can be obtained by the electrolysis of conc. H 2 S O 4 4 . H 2 O 2 reduces Mn (VII) to Mn (II)

Step-by-step solution

Here statements 2, 3 and 4 are correct as follows H 2 O 2 is weakly acidic, but more acidic than water. H 2 O 2 + H 2 O → H 3 O + + H O 2 - 2 F e 2 + + H 2 O 2 + 2 H + → 2 F e 3 + + 2 H 2 O H 2 S O 4 ⇌ H + + H S O 4 - The peroxy disulphuric acid is hydrolysed separately to get H 2 O 2 . H 2 S 2 O 8 + H 2 O → H 2 S O 5 + H 2 S O 4 H 2 S O 5 + H 2 O → H 2 S O 4 + H 2 O 2 2 M n O 4 - + 5 H 2 O 2 + 6 H + → 2 M n 2 + + 8 H 2 O + 5 O 2