Q. Which of the following is an example of coordination compound ?

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$\text{CoCl}_{3} \cdot \text{6NH}_{3}$

$\text{KCl} · \text{MgCl}_{2} · 6 \text{H}_{2} \text{O}$

$\text{FeSO}_{4} · 6 \text{H}_{2} \text{O}$

$\left(\text{FeSO}\right)_{4} · \left(\left(\text{NH}\right)_{4}\right)_{2} \left(\text{SO}\right)_{4} · 6 \left(\text{H}\right)_{2} \text{O}$

Solution:

$CoCl_{3}\cdot 6NH_{2}$ for coordination compounds while $KClMgCl_{2}\cdot 6H_{2}O,FeSO_{4}\cdot \left(N H_{4}\right)_{2}SO_{4}\cdot 6H_{2}O$ are double salt while $FeSO_{4}\cdot 6H_{2}O$ is simple salt.

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