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   :

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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 &#160; : &#160; 1 I Pale blue B 1 &#160; : &#160; 2 II Blue / Purple C 1 &#160; : &#160; 3 III Violet D IV Green The correct match is

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Correct answer: A. A B C I II III

According to the question, in case of [ MX 6 ] , &#160; 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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