Question 1
Which reagent, when mixed and heated with ammonium sulfate, liberates ammonia?
aqueous bromine
dilute hydrochloric acid
limewater
potassium dichromate(VI) in acidic solution
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Question 2
Which observation would confirm that ammonia gas is released when solid ammonium chloride is warmed with solid calcium hydroxide?
damp blue litmus paper turns red when touched onto the solid mixture
damp red litmus paper turns blue when touched onto the solid mixture
damp blue litmus paper turns red when held just above the solid mixture
damp red litmus paper turns blue when held just above the solid mixture
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Question 3
Compound T is a white crystalline solid.
When a sample of T was mixed with aqueous sodium hydroxide and heated, a pungent smelling gas was produced which turned damp red litmus paper blue. This same gas produced dense white smoke with hydrogen chloride gas.
Further testing of a solution of T with barium chloride solution produced a dense white precipitate which did not dissolve when dilute hydrochloric acid was added to the mixture.
What is the identity of compound T?
ammonium carbonate
ammonium sulfate
sodium carbonate
sodium sulfate
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