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Question

Mn2+ is identified by its oxidation to a salt giving pink colour in solution.

Which of the following is correct?
(a) The pink colour is due to the formation of MnO−4.
(b) Oxidising agent used is Br2 water or PbO2/H+.
(c) Oxidised Mn2+ changes to K2MnO4 (green) by KOH


A
All are correct
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B
Only (a) and (b) are correct
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C
Only (b) and (c) are correct
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D
Only (c) is correct
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Solution

The correct option is A All are correct
(a) Mn(II) is oxidized to pink coloured permanganate ion (MnO4.
(b) Bromine water or acidified lead oxide (PbO2/H+) can be used as oxidizing agents.
(c) Pink coloured permangante ion reacts with KOH to form green coloured manganate ion (MnO24).
Option A is correct.

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