MHT CET Medical202625 April 2026Evening ShiftChemistryRedox ReactionsActual
What is the oxidation number of phosphorus in Mg ₂ P ₂ O ₇ ?
Options
- A+3
- B-3
- C+7
- D+5
Correct answer
D. +5
Step-by-step solution
Let the oxidation state of phosphorus be x . The oxidation state of magnesium is +2 and oxygen is -2 . In Mg ₂ P ₂ O ₇ , the sum of oxidation states of all atoms is zero. 2(+2) + 2(x) + 7(-2) = 0 4 + 2x - 14 = 0 2x - 10 = 0 2x = 10 x = +5 Answer: +5