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Question

20 ml of H2O2 after acidification with dil H2SO4. required 30 ml of N/2 KMnO4 for complete oxidation. Calculate the % of H2O2 in g/lit.
  1. 10.75 g/lit
  2. 12.75 g/ lit
  3. 13.75 g/lit
  4. 11.75 g/lit

A
11.75 g/lit
B
12.75 g/ lit
C
13.75 g/lit
D
10.75 g/lit
Solution
Verified by Toppr

15 milli equivalents of KMnO4 require 15 milli equivalents of H2O2.

Hence, 15 milli equivalents are present in 20 ml of sample.

Thus, strength is 15×1720=12.75.

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