Which of the following halides is least stable and has doubtful existence?
Lead exists as PbI2 because of the oxidising power of Pb+4 and reducing power of I–.
A certain salt (X) gives the following tests:
(i) Its aqueous solution is alkaline to litmus.
(ii) On strongly heating it swells to give a glassy bead
(iii) When concentrated sulphuric acid is added to a hot concentrated solution of (X), crystals of H3BO3 separate out.
Identify the colour of these crystals.
Silicon carbide is used as a/an