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The formula of the complex tris (ethylene diamine) cobalt (III) sulphate is –
A
[Co(en)₂SO₄]
B
[Co(en)₃SO₄]
C
[Co(en)₃]SO₄
D
[Co(en)₃]₂(SO₄)₃
Explanation
[Co(en)₃]³⁺ combines with SO₄²⁻ to give [Co(en)₃]₂(SO₄)₃.
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