The pair (s) where both the ions are precipitated upon passing H_(2)S gas in the presence of dilute HCl is (are) :

The pair (s) where both the ions are precipitated upon passing H_(2)S

1.	The pair (s) where both the ions are precipitated upon passing H_(2)S gas in the presence of dilute HCl is (are) :
Answer» `BA^(2+) , Zn^(2+)` `Ba^(2+), Fe^(3+)` `Cu^(2+) , Pb^(2+)` `HG^(2+), Bi^(3+)` Solution :All the ions are present in two pairs BELONGING to IInd group of basic RADICALS. They will be precipitated as their sulphides