Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it.

Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless.

Answer says assertion is true but reason is false. Explain.

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Solution

KMnO₄ + H₂ → 2MnO₂ + 2KOH + 2H₂O Here, the assertion is right. But when pottassium permanganate is treated with hydrogen, Mn(IV) is formed which is colourless.Not Mn(II).
Hence the reason given is false.

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Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it. Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless. Answer says assertion is true but reason is false. Explain.

KMnO4 + H2 → 2MnO2 + 2KOH + 2H2O Here, the assertion is right. But when pottassium permanganate is treated with hydrogen, Mn(IV) is formed which is colourless.Not Mn(II). Hence the reason given is false.

Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it.

Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless.

Answer says assertion is true but reason is false. Explain.

KMnO₄ + H₂ → 2MnO₂ + 2KOH + 2H₂O Here, the assertion is right. But when pottassium permanganate is treated with hydrogen, Mn(IV) is formed which is colourless.Not Mn(II).
Hence the reason given is false.