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Amongst {[{T}{i}{E}_{{{6}}}]}^{{{2}-}},{[{C}{o}{F}_{{{6}}}]}^{

Question

Amongst $[T i E_{6}]^{2 -}, [C o F_{6}]^{3 -}, C u_{2} C l_{2}$ and $[N i C l_{4}]^{2 -}$ [Atomic no. $T i = 22, C o = 27, C u = 29, N i = 28$ ] the colourless species are :
(A) $[T i F_{6}]^{2 -}$ and $[C u_{2} C l_{2}]$
(B) $C u_{2} C l_{2}$ and $[N i C l_{4}]^{2 -}$
(C) $[T i F_{6}]^{2 -}$ and $[C o F_{6}]^{3 -}$
(D) $[C o F_{6}]^{3 -}$ and $[N i C l_{4}]^{2 -}$

T i F_{6}^{2 -} and C o F_{6}^{3 -}

C u_{2} C l_{2} and N i C l_{4}^{2 -}

T i F_{6}^{2 -} and C u_{2} C l_{2}

C o F_{6}^{3 -} and N i C l_{4}^{2 -}

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Amongst

[T i E_{6}]^{2 -}, [C o F_{6}]^{3 -}, C u_{2} C l_{2}

and

[N i C l_{4}]^{2 -}

[Atomic no.

T i = 22, C o = 27, C u = 29, N i = 28

] the colourless species are :
(A)

[T i F_{6}]^{2 -}

and

[C u_{2} C l_{2}]

(B)

C u_{2} C l_{2}

and

[N i C l_{4}]^{2 -}

(C)

[T i F_{6}]^{2 -}

and

[C o F_{6}]^{3 -}

(D)

[C o F_{6}]^{3 -}

and

[N i C l_{4}]^{2 -}

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Text solutionVerified

T i F_{6}^{2 -}, T i is present as T i^{4 +} . T i^{4 +} = [A r] 3 d^{0} 4 s^{0}

Hence,

T i F_{6}^{2 -}

is colourless due to the absence of unpaired electron.
In

C u_{2} C l_{2}, C u is present as C u^{+} .

Due to absence of unpaired electrons,

C u_{2} C l_{2}

is colourless.

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Question Text	Amongst $[T i E_{6}]^{2 -}, [C o F_{6}]^{3 -}, C u_{2} C l_{2}$ and $[N i C l_{4}]^{2 -}$ [Atomic no. $T i = 22, C o = 27, C u = 29, N i = 28$ ] the colourless species are : (A) $[T i F_{6}]^{2 -}$ and $[C u_{2} C l_{2}]$ (B) $C u_{2} C l_{2}$ and $[N i C l_{4}]^{2 -}$ (C) $[T i F_{6}]^{2 -}$ and $[C o F_{6}]^{3 -}$ (D) $[C o F_{6}]^{3 -}$ and $[N i C l_{4}]^{2 -}$
Answer Type	Text solution:1
Upvotes	150