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Question

Complete the following reactions.
(i)Cr2O27+3SO2+2H+2Cr3++____ +H2O
(ii)2MnO4+5SO23+6H+2MN2++____ 3H2O
(iii)Cr2O27+6Fe2++14H+2Cr3+____7H2O

A
3SO24,SO22,Fe3+
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B
3SO24,5SO24,6Fe3+
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C
3SO24,SO2,K+
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D
S,SO2,Fe3+
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Solution

The correct option is B 3SO24,5SO24,6Fe3+
(i)+5Cr2O27++43SO2+2H+2Cr3++3+6SO24+H2O
(ii)2+7MnO4++45SO23+16H+2Mn2++65SO24+3H2O
(iii)+5Cr2O27+6Fe2++14H+2Cr3++6Fe3++7H2O

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