The valency of the cuprammonium ion is

Which of the following statements is true about $[Cu(NH_3)_4]SO_4$?

What is the coordination number of the metal in $[Co(en)_2Cl_2]$?

Select the correct statement about the given complex $[Co(NH_3)_4Cl_2]Cl$.

$A$ $200 \ mL$ solution $X$ contains $0.02 \ mol$ of $[Co(NH_3)_5Br]Cl_2$ and $0.02 \ mol$ of $[Co(NH_3)_5Cl]SO_4$. If solution $X$ is treated with excess $AgNO_3$ and excess $BaCl_2$,what will be the number of moles of precipitates $Y$ and $Z$ formed,respectively?

Which one of the following complexes will consume more equivalents of aqueous solution of $AgNO_3$?