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Q.

The number of moles of K2Cr2O7, reduced by 1 mol of Sn2+ ions is

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a

1/3

b

3

c

1/6

d

6

answer is A.

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Detailed Solution

6e−+Cr2O72−→2Cr3+Sn2+⟶Sn4++2e−Equivalent of Cr2O72-=Equivalent of Sn2+                  (n=6)                                      (n=2)⇒1 Eq = 1 Eq 16 mol=12mol 13 mol of Cr2O72-=1 mol of Sn2+
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The number of moles of K2Cr2O7, reduced by 1 mol of Sn2+ ions is