Choose the correct statement(s) among the following [JEE Advanced 2020]

\(SnCl _2 \cdot 2 H _2 O\) is a reducing agent

\(SnO _2\) reacts with \(KOH\) to not form \(K _2\left[ Sn ( OH )_6\right]\)

A solution of \(PbCl _2\) in \(HCl\) contains \(Pb ^{2+}\) and \(Cl ^{-}\)ions

The reaction of \(Pb _3 O _4\) with hot dilute nitric acid to give \(PbO _2\) is a redox reaction