A salt, when warmed with zinc powder and an NaOH solution, gives a gas that turns a…
CHEMISTRY · Single correct · GCSE · Chemistry · Chemical Analysis · Chemical Analysis
Problem
A salt, when warmed with zinc powder and an NaOH solution, gives a gas that turns a filter paper soaked with an alkaline solution of K2[HgI4] brown. The salt responds to the brown ring test when acetic acid is used in place of sulphuric acid. The anion present in the salt is:
(1) NO3−
(2) NO2−
(3) Br−
(4) None of these