25 mL of 0.50 M H2O2 solution is added to 50 mL of 0.20 M KMnO4 in acid solution. Which of the following statements is true ?

25 mL of 0.50 M H2O2 solution is added to 50 mL of 0.20 M KMnO4 in acid solution. Which of the following statements is true ?

  1. A

    0.010 mole of oxygen is liberated

  2. B

    0.005 mole of  KMnO4 are left

  3. C

    0.030 g atom of oxygen gas is evolved

  4. D

    0.0025 mole of H2O2 does not react with  KMnO4 

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    Solution:

    M eq. of KMnO4 = 0.2 × 50 × 5=50 M eq. of H2O2 = 2 × 25 ×0 .5 =25 M eq. of KMnO4 remaining = 50-25=25 Mole of KMnO4 = 255 × 10-3 = 5 × 10-3 = 0.005

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