The oxidation of chromium in Cr\(_2\)O\(_7)\(-2\) ?

A.

+4

B.

+5

C.

+6

D.

+7

View answer & explanation

Correct answer is C

2 atoms of Cr,

7 X -2 atoms of O

2Cr - 14 = -2

2Cr = -2 + 14

2Cr = 12

Cr = 6

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