Q.

The oxidation state of Sc in Sc2Si2O7 is 

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a

+6

b

+3

c

+4

d

+2

answer is B.

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Detailed Solution

The charge of Si2O7x is Si2O7xSiO442O2Si2O76- Hence, the charge on Sc is (6+)/2=3+Alternatively, 2x+2(4+)+7(2)=0  x=3+

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The oxidation state of Sc in Sc2Si2O7 is