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MHT CET 202625 AprilEvening Shift
Exam
MHT CET
Year
2026
Date
25 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Redox Reactions

MHT CET 2026 · 25 April · Evening Shift · Chemistry · Redox Reactions

What is the oxidation number of phosphorus in Mg_2P_2O_7 ?

What is the oxidation number of phosphorus in Mg2P2O7\text{Mg}_2\text{P}_2\text{O}_7?

Options

  1. A+3+3
  2. B−3-3
  3. C+7+7
  4. D+5+5

Correct answer

D. +5+5

Step-by-step solution

Let the oxidation state of phosphorus be xx.

The oxidation state of magnesium is +2+2 and oxygen is −2-2.

In Mg2P2O7\text{Mg}_2\text{P}_2\text{O}_7, the sum of oxidation states of all atoms is zero.

2(+2)+2(x)+7(−2)=02(+2) + 2(x) + 7(-2) = 0

4+2x−14=04 + 2x - 14 = 0

2x−10=02x - 10 = 0

2x=102x = 10

x=+5x = +5

Answer: +5+5
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