[ આપેલ : પરમાણુ ક્માંક : $\mathrm{C}: 6, \mathrm{Na}: 11, \mathrm{O}: 8, \mathrm{Fe}: 26, \mathrm{Cr}: 24]$
\(8 \mathrm{Na}_2 \mathrm{CrO}_4+2 \mathrm{Fe}_2 \mathrm{O}_3+8 \mathrm{CO}_2\)
\(\mathrm{~A} \quad \text { B }\)
Spin only magnetic moment
\(\text { For } \mathrm{Na}_2 \mathrm{CrO}_4 \mu_{\mathrm{B}}=0\)
\(\text { For } \mathrm{Fe}_2 \mathrm{O}_3 \mu_{\mathrm{B}}=5.9\)
\(\quad \text { sum }=5.9\)
$A$. $\mathrm{Ti}^{3+}$ $B$. $\mathrm{Cr}^{2+}$ $C$. $\mathrm{Mn}^{2+}$ $D$.$\mathrm{Fe}^{2+}$ $E$. $\mathrm{Sc}^{3+}$
નીચે આપેલા વિકલ્પોમાંથી સૌથી બંધબેસતો જવાબ પસંદ કરો.