The reaction of aqueous Ni H 2 0 6 2 + Is performed by the addition of a bidentate ligand ethane-1, 2, diamine (en) Match the following Ni H 2 O 6 2 + : en molar ratio Colour of the product A 1 : 1 I Pale blue B 1 : 2 II Blue / Purple C 1 : 3 III Violet D IV Green The correct match is

Question

The reaction of aqueous Ni H 2 0 6 2 + Is performed by the addition of a bidentate ligand ethane-1, 2, diamine (en) Match the following Ni H 2 O 6 2 + : en molar ratio Colour of the product A 1 : 1 I Pale blue B 1 : 2 II Blue / Purple C 1 : 3 III Violet D IV Green The correct match is, A B C I II III, A B C II III IV, A B C III I II ., A B C IV I III

MARKS App · Accepted Answer

According to the question, in case of [ MX 6 ] , M = Ni , X= weak field ligand or strong field ligand, Nickel is always forms sp 3 d 2 Hybridisation. Ni + 2 = 3 d 8 , 4 s 0 . In this condition Nickel has two -unpair electrons. Due to this it shows green colour.

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	${[Ni {(H_{2} O)}_{6}]}^{2 +} :$ en molar ratio		Colour of the product
A	$1 : 1$	I	Pale blue
B	$1 : 2$	II	Blue / Purple
C	$1 : 3$	III	Violet
D		IV	Green