Q. The oxidation number of chromium in K₂Cr₂O₇ is:

K₂Cr₂O₇ में क्रोमियम की ऑक्सीकरण संख्या है:

A
=+3
B
=+6
C
=+7
D
=+12

Explanation

In K₂Cr₂O₇:

  • K has oxidation number +1
  • O has oxidation number -2
  • Let Cr oxidation number = x

Setting up the equation: 2(+1) + 2(x) + 7(-2) = 0 2 + 2x - 14 = 0 2x = 12 x = +6

Therefore, chromium has oxidation number +6.

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