Some salts,although containing two different metallic elements,give a test for only one of them in solution. Such salts are:

$A$ $2 \ L$ solution is prepared by mixing $0.02 \ mol$ of $[Co(NH_3)_5SO_4]Br$ and $0.02 \ mol$ of $[Co(NH_3)_5Br]SO_4$. If $1 \ L$ of this mixture $X$ is treated with $AgNO_3$ to give $Y$,and another $1 \ L$ of mixture $X$ is treated with $BaCl_2$ to give $Z$,find the moles of $Y$ and $Z$.

Which of the following are examples of double salts?
$A$. $FeSO_4 \cdot (NH_4)_2SO_4 \cdot 6H_2O$
$B$. $CuSO_4 \cdot 4NH_3 \cdot H_2O$
$C$. $K_2SO_4 \cdot Al_2(SO_4)_3 \cdot 24H_2O$
$D$. $Fe(CN)_2 \cdot 4KCN$
Choose the correct answer.

When $AgNO_3$ is added to a solution of $Co(NH_3)_5Cl_3$,the precipitate of $AgCl$ shows two ionizable chloride ions. This means

Explain the classification of ligands on the basis of their denticity.

The mass of carbon present in $0.5 \, mol$ of $K_4[Fe(CN)_6]$ is .............. $g$.