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Question

Which of the following complex(s) will have blue color solution or ppt.?

A
[Cu(NH3)4]SO4
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B
[Cu(NH3)4](OH)2
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C
Co[Hg(SCN)4]
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D
K3[Co(NO2)6]
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Solution

The correct options are
A [Cu(NH3)4](OH)2
B Co[Hg(SCN)4]
C [Cu(NH3)4]SO4
Option (A),(B), (C) are correct.
(D) : K3[Co(NO2)6] will have yellow ppt.

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