Question

Analysis show that nickel oxide consist of nickel ion with 96% ions having $d^a$ configuration and 4% having $d^7$ configuration. Which amongst the following best represents the formula of the oxide?

• A. $N{i}_{1.02}{O}_{1.00}$
• B. $N{i}_{0.96}{O}_{1.00}$
• C. $N{i}_{0.96}{O}_{0.98}$
• D. $N{i}_{0.98}{O}_{1.00}$

Answer 1

The correct option is D $N{i}_{0.98}{O}_{1.00}$

Analysis show that nickel oxide consist of nickel ions with $96\%$ having

$d^a$ and $4\%$ $d^7$ configuration.

For $Ni$,

$d^8\to N{i}^{2+},d^7\to N{o}^{3+}$.

Total charge of nickel.

$(0.96\times 2)+(0.04\times 3)=2.04$.

No. of $O^{2-}ion=\frac{2.04}{2}=1.02$.

Formula of solid $=Ni{O}_{1.02}=N{i}_{0.98}O$.