4. Name gas evolved and state relevant observation A. Hcl is brought near ammonia gas
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(i) Sulphur-di-oxide gas is evolved. Colourless, gas with smell of burning sulphur. It turns acidified potassium dichromate orange to green.
(ii) Hydrogen sulphide gas is evolved. Colourless gas with smell of rotten eggs. It turns lead acetate paper black.
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A white f
solid of ammonium chloride is
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