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Question: Complete the following reactions. (i) \(Cr_{2}O_{7}^{2 -} + 3SO_{2} + 2H^{+} \rightarrow 2Cr^{3 +} ...

Complete the following reactions.

(i) Cr2O72−+3SO2+2H+→2Cr3++____+H2OCr_{2}O_{7}^{2 -} + 3SO_{2} + 2H^{+} \rightarrow 2Cr^{3 +} + \_\_\_\_ + H_{2}O

(ii)2MnO4−+5SO32−+6H+→2Mn2++____+3H2O2MnO_{4}^{-} + 5SO_{3}^{2 -} + 6H^{+} \rightarrow 2Mn^{2 +} + \_\_\_\_ + 3H_{2}O (iii) Cr2O72−+6Fe2++14H+→2Cr3++…+7H2O\mathrm { Cr } _ { 2 } \mathrm { O } _ { 7 } ^ { 2 - } + 6 \mathrm { Fe } ^ { 2 + } + 14 \mathrm { H } ^ { + } \rightarrow 2 \mathrm { Cr } ^ { 3 + } + \ldots + 7 \mathrm { H } _ { 2 } \mathrm { O }

A

3SO42−,SO22−,Fe3+3SO_{4}^{2 -},SO_{2}^{2 -},Fe^{3 +}

B

3SO42−,5SO42−,6Fe3+3SO_{4}^{2 -},5SO_{4}^{2 -},6Fe^{3 +}

C

3SO42−,SO2,K+3SO_{4}^{2 -},SO_{2},K^{+}

D

S,SO2,Fe3+S,SO_{2},Fe^{3 +}

Answer

3SO42−,5SO42−,6Fe3+3SO_{4}^{2 -},5SO_{4}^{2 -},6Fe^{3 +}

Explanation

Solution

3SO42−,5SO42−,6Fe3+3SO_{4}^{2 -},5SO_{4}^{2 -},6Fe^{3 +}