In the complex $[Co(NH_3)_6]^{3+}$,which species act as a Lewis acid and a Lewis base,respectively?

Excess of silver nitrate solution is added to $100 \ mL$ of $0.01 \ M$ pentaaqua chloro chromium $(III)$ chloride solution. The mass of silver chloride obtained in grams is [Atomic mass of silver is $108$].

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

The number of ions produced in an aqueous solution by the compound $[Co(NH_3)_4Cl_2]Cl$ is ..........

Ammonia acts as a ligand but ammonium ion does not form complexes because

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.