MCQ
Which is incorrect
- ✓$Ni (CO)_4 -$ Tetrahedral, Paramagnetic
- B$[Ni(CN)_4]^{-2} -$ Square planar, diamagnetic
- C$Ni(CO)_4 -$ Tetrahedral, diamagnetic
- D$[NiCl_4]^{-2} -$ Tetrahedral, Paramagnetic
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${X_2} + {O_2} \rightleftharpoons 2XO\,\,\,\,\,\,\,\,\,\,\,{K_1} = 5$
${X_2} + 2{O_2} \rightleftharpoons 2X{O_2}\,\,\,\,\,\,\,\,\,\,\,{K_2} = 10$
$A.$ $Sm ^{2+}$ $B.$ $Ce ^{2+}$ $C.$ $Ce ^{4+}$ $D.$ $Tb ^{4+}$
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