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Question

The oxidation number of chromium in K2CrO4 is:

A
+2
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B
+3
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C
+6
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D
+8
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Solution

The correct option is A +6
In K2CrO4,
Oxidation no. of K=+1.
Oxidation no. of O=2.
Oxidation no. of Cr be x.
2(1)+x+4(2)=0,2+x8=0,x6=0,x=6.
Oxidation no. of Chromium in K2CrO4 is 6.

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