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  4. When acidified K2Cr2O7 solution is added to Sn2+ salts, then Sn2+ changes to

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Q. When acidified $K_2Cr_2O_7$ solution is added to $Sn^{2+}$ salts, then $Sn^{2+}$ changes to

The d-and f-Block Elements

Solution:

$Cr_2O^{2-}_7 + 14H^+ + 3Sn^{2+} \rightarrow 2Cr^{3+} +3Sn^{4+} +7H_2O$