Which of the following oxidation numbers is not correctly matched?

Question

Which of the following oxidation numbers is not correctly matched? (A) P in NaH2PO4 = +5 (B) Ni in [Ni(CN)6]4- = +2 (C) P in Mg2P2O7 = +6 (D) Cr in (NH4)2Cr2O7 = +6

Tardigrade Admin · Accepted Answer

Mg2P2O7 = +5 2(+2) + 2x - 14 = 0 2x= 10 ⇒ x = +5

Q. Which of the following oxidation numbers is not correctly matched?

$P$ in $N a H_{2} P O_{4} = + 5$

$N i$ in $[N i (CN)_{6}]^{4 -} = + 2$

$P$ in $M g_{2} P_{2} O_{7} = + 6$

$C r$ in $(N H_{4})_{2} C r_{2} O_{7} = + 6$

$M g_{2} P_{2} O_{7} = + 5$
$2 (+ 2) + 2 x - 14 = 0$
$2 x = 10 \Rightarrow x = + 5$

Q. Which of the following oxidation numbers is not correctly matched?

P in NaH2​PO4​=+5

Ni in [Ni(CN)6​]4−=+2

P in Mg2​P2​O7​=+6

Cr in (NH4​)2​Cr2​O7​=+6

Mg2​P2​O7​=+5 2(+2)+2x−14=0 2x=10⇒x=+5

$P$ in $N a H_{2} P O_{4} = + 5$

$N i$ in $[N i (CN)_{6}]^{4 -} = + 2$

$P$ in $M g_{2} P_{2} O_{7} = + 6$

$C r$ in $(N H_{4})_{2} C r_{2} O_{7} = + 6$

$M g_{2} P_{2} O_{7} = + 5$
$2 (+ 2) + 2 x - 14 = 0$
$2 x = 10 \Rightarrow x = + 5$