સંયોજનોના રંગોની તીવ્રતાનો સાચો ક્રમ છે:

Question

A$\left[{Ni}({CN})_{4}\right]^{2-}>\left[{NiCl}_{4}\right]^{2-}>\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{2+}$
B$\left[{NiCl}_{4}\right]^{2-}>\left[{Ni}({CN})_{4}\right]^{2-}>\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{2+}$
C$\left[{NiCl}_{4}\right]^{2-}>\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{2+}>\left[{Ni}({CN})_{4}\right]^{2-}$
D$\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{2+}>\left[{NiCl}_{4}\right]^{2-}>\left[{Ni}({CN})_{4}\right]^{2-}$

JEE MAIN 2021, Diffcult

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Solution

c
$\left[{NiCl}_{4}\right]^{-2-}>\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{-2+}>\left[{Ni}({CN})_{4}\right]^{-2-}$

Splitting energy order : $\Delta_{{t}}<\Delta_{0} \quad<\Delta_{{sq}}$

absorbed energy order : $\left[{NiCl}_{4}\right]^{-2-}<\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{-2+}<\left[{Ni}({CN})_{4}\right]^{-2-}$

intensity of colour of compound : $\quad\left[{NiCl}_{4}\right]^{-2-}>\left[{Ni}\left({H}_{2} {O}\right)_{6}\right]^{2+}>\left[{Ni}({CN})_{4}\right]^{2-}$

સૂચિ $I$ (Complexes)	સૂચિ $II$ (Hybridisation)
$A$ $\left[ Ni ( CO )_4\right]$	$I$ $sp ^3$
$B$ $\left[ Cu \left( NH _3\right)_4\right]^{2+}$	$II$ $dsp^2$
$C$ $\left[ Fe \left( NH _3\right)_6\right]^{2+}$	$III$ $sp^3d^2$
$D$ $\left[ Fe \left( H _2 O \right)_6\right]^{2+}$	$IV$ $d^2sp^3$

સૂચિ $-I$ (આયન સામેલ છે)	સૂચિ $-II$ (કરતા)
$(i)\, Ni^{2+}$	$(A)$ સોડિયમ થાયોસલ્ફેટ
$(ii)\, Ag^+$	$(B)$ સોડિયમ નાઇટ્રોપ્રુસાઈડ
$(iii)\, Cu^{2+}$	$(C)$ એમોનિયા
$(iv)\,S^{2-}$	$(D)$ ડાયમિથાઇલ ગ્લાયોક્સાઇમ

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