A piece of filter paper moistened with lead (ll) ethanoate solution turns black when the paper is dropped into a gas likely to be
sulphur(VI) oxide
hydrogen chloride
sulphur (VI) oxide
hydrogen sulphide
Which gas has a characteristic pungent smell, turns red litmus paper blue and forms dense white fumes with hydrogen chloride gas?
N2
N2O
Cl2
NH3
Commercial bleaching can be carried out using
sulphur (IV) oxide and ammonia
hydrogen sulphide and chlorine
chlorine and sulphur (IV) oxide
ammonia and chlorine
Mineral acids are usually added to commercial hydrogen peroxide to
oxidize it
decompose it
minimize its decomposition
reduce it to water and oxygen
Which compound will give a brick‑red colour in a non‑luminous Bunsen flame?
LiCl
NaCl
CaCl2
MgCl2
