What volume of \( 0.18 \mathrm{~N}-\mathrm{KMnO}_{4} \) solution wo...

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What volume of \( 0.18 \mathrm{~N}-\mathrm{KMnO}_{4} \) solution would
P be needed for complete reaction with \( 25 \mathrm{ml} \) of

W \( 0.21 \mathrm{~N}-\mathrm{KNO}_{2} \) in acidic medium?
(1) \( 57.29 \mathrm{ml} \)
(2) \( 11.67 \mathrm{ml} \)
(3) \( 29.17 \mathrm{ml} \)
(4) \( 22.92 \mathrm{ml} \)
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