Question:medium

When an aqueous solution of copper(II) sulphate is saturated with ammonia, the blue compound crystallises on evaporation. The formula of this blue compound is:

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Tetraammine copper(II) sulphate gives intense blue colour.
Updated On: Mar 20, 2026
  • [Cu(NH₃)₄]SO₄·H₂O (square planar)
  • [Cu(NH₃)₄]SO₄ (tetrahedral)
  • [Cu(NH₃)₆]SO₄ (octahedral)
  • [Cu(SO₄)(NH₃)₅] (octahedral)
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The Correct Option is A

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