Which of the following cations will form an insoluble red-brown compound with ?

CHEMISTRY · Single correct · GCSE · Chemistry · Chemical Analysis · Chemical Analysis

Problem

Which of the following cations will form an insoluble red-brown compound with

[\text{Fe}(\text{CN})_6]^{4-}

? (1)

\text{Hg}^{2+}

(2)

\text{Pb}^{2+}

(3)

\text{Cu}^{2+}

(4)

\text{Cd}^{2+}