AP EAMCET201825 Apr 2018Morning ShiftChemistryRedox ReactionsActual
2 KMnO 4 + 3 H 2 SO 4 + 5 H 2 O 2 → K 2 SO 4 + 2 MnSO 4 + 8 H 2 O + 5 O 2 Find the nonnality of H 2 O 2 solution, if 20 mL of it is required to react completely with 16 mL of 0 . 02 MKMnO 4 solution. ( Molar mass of KMnO 4 = 158 g mol - 1 )
Options
- A4 × 10 - 2   N
- B2 × 10 - 2   N
- C6 × 10 - 2   N
- D8 × 10 - 2   N
Correct answer
D. 8 × 10 - 2   N
Step-by-step solution
n . f .   of   H 2 O 2 = 2 n . f .   of   KMnO 4 = 5 Number of mequivalents of   H 2 O   2 = Number of mequivalents of   KMnO 4 N 1 V 1 = N 2 V 2 N 1 = N 2 V 2 V 1 = ( 0 . 02 × 5 ) × 16 20 = 0 . 08   N