List of top Chemistry Questions on Hydrolysis of salts asked in JEE Main

Consider the following reactions.
\(PbCl_2 + K_2CrO_4 \rightarrow A + 2KCl\) (Hot solution)
\(A + NaOH \rightarrow B + Na_2CrO_4\)
\(PbSO_4 + 4CH_3COONH_4 \rightarrow (NH_4)_2SO_4 + X\)
In the above reactions, A, B and X are respectively: