Answer :

The chloride is NiCl2, which forms a green solution.

Answer:

The correct answer is option (4) NiCl2

Explanation:

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Nickel Chloride (NiCl2) is a compound (a salt) that when dissolved in water, a greenish yellow solution remains.

The other three salts: Hydrogen Chloride, Calcium Dichloride and Potassium Chloride are salts that do not form colored solutions.

Therefore, we can conclude that the correct answer is option (4) NiCl2