NEET2019ChemistryRedox ReactionsActual
What is the oxidation number of Cr in Na ₂ Cr ₂ O ₇ ?
Options
- A2
- B6
- C10
- D16
Correct answer
B. 6
Step-by-step solution
Let the oxidation number of Cr in Na ₂ Cr ₂ O ₇ be x . array r 2(+1)+2 x+7(-2)=0 2+2 x-14=0 2 x=12 x=6 array