25mL of 0.5M H2O2 solution is added to 50 mL of 0.2M KMnO4in acid solution. Which of the following statements is false?

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25mL of 0.5M $H_{2} O_{2}$ solution is added to 50 mL of 0.2M $K M n O_{4}$ in acid solution. Which of the following statements is false?

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0.010 mole of oxygen gas is liberated

0.005 mole of KMnO_4 is left

0.030" " g of oxygen gas is evolved

0.0025 mole $H_{2} O_{2}$ does not react with $K M n O_{4}$

answer is A, C, D.

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Detailed Solution

mlli equivalent of $H_{2} O_{2}$

$= 25 x 0.5 x 2 = 25$

milli equivalent of ${KMnO}_{4}$

$= 50 x 0.2 x 5 = 50$

$∴$ milli equivalent of ${KMnO}_{4}$ left $= 25 = 5 m mol$

$∴$ milli equivalent of $O_{2}$ evolved $= 25 = \frac{25}{1000} \times 8 g$

Hence, the correct option is a, c and d.

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