Question

Oxidation number of P in $H_4{P}_2{O}_5,H_4{P}_2{O}_6,H_4{P}_2{O}_7$ respectively are

• A. + 3, + 5, + 4
• B. + 4, + 3, + 5
• C. + 3, + 4, + 5
• D. + 5, + 3, + 4

Answer 1

Answer: (C)

$H_4{P}_2{O}_6=4\times 1+2\times a-5\times 2=0$ $a=+3$ $H_4{P}_2{O}_6=4\times 1+2\times a-6\times 2=0$ $a=+4$ $H_4{P}_2{O}_7=4\times 1+2\times a-7\times 2=0$ $a=+5$