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  4. The colour of [ Cu ( NH 3)4]2+ complex is

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Q. The colour of $\left[ Cu \left( NH _{3}\right)_{4}\right]^{2+}$ complex is

The p-Block Elements - Part2

Solution:

$Cu ^{2+}+4 NH _{3} \longrightarrow\left[ Cu \left( NH _{3}\right)_{4}\right]^{2+}$
The colour of $\left[ Cu \left( NH _{3}\right)_{4}\right]^{2+}$ complex is deep blue.