When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be: (A) Pale Blue Blue Violet Green (B) Violet Blue Pale Blue

Question

When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:

(A) Pale Blue Blue Violet Green
(B) Violet Blue Pale Blue Green
(C) Pale Blue Blue Green Violet
(D) Green Pale Blue Blue Violet

Prashant Kotian · Accepted Answer

Correct answer: D. en(aq) [Ni(H2O)6]2+ Green [Ni(H2O)4en]2+ Pale blue [Ni(H2O)2(en)2]2+ Blue en(aq) [Ni(en)3]2+ Violet en(aq)

💡 Solution & Explanation