On reacting copper hydroxide with an excess of ammonium hydroxide and ammonium sulphate, we get a deep blue solution. The formula of the solution is :

[C u (N H_{3})_{3}] S O_{4}

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[C u (N H_{3})_{4}] S O_{3}

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[C u (N H_{3})_{4}] S O_{4}

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[C u (N H_{3})_{2}] S O_{4}

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Solution

The correct option is B $[C u (N H_{3})_{4}] S O_{4}$
$C u C l_{2} + (N H_{4})_{2} S O_{4} + 2 N H_{4} O H ⟶ 4 H_{2} O + [C u (N H_{3})_{4}] S O_{4}$
$[C u (N H_{3})_{4}] S O_{4}$ is a deep blue solution and the reaction is a characteristic property of $C u^{2 +}$ .

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Similar questions

What do you observe when blue coloured copper sulphate reacts with ammonium hydroxide?

Which solution becomes a deep/Inky blue colour when excess of ammonium hydroxide is added to it?

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