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Question

In the chemical reaction,
K2Cr2O7+xH2SO4+ySO2K2SO4+Cr2(SO4)3+zH2O
x, y and z are, respectively :

A
1, 3, 1
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B
4, 1, 4
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C
3, 2, 3
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D
2, 1, 2
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Solution

The correct option is A 1, 3, 1
The balanced equation is given below:
14H+6e+Cr2O272Cr3++7H2O
6H2O+3SO23SO24+6e+12H
_______________________________________________
Cr2O27+2H+3SO22Cr3++3SO24+H2O
_______________________________________________
It can be written as follows:
K2Cr2O7+H2SO4+3SO2Cr2(SO4)3+K2SO4+H2O
x=1,y=3,z=1

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