OBSERVATIONS - AMMONIA class 10 icse chemistry

OBSERVATIONS - AMMONIA

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State your observations when:

1. The gas, which is produced by adding warm water to Magnesium nitride, is passes into Nesseler's reagent. Ans: That gas turns turns the Nessler's reagent to brown which gives a reddish brown precipitate.
2. In fountain experiment using Ammonia gas. Ans: The litmus solution rises in the jet tube and ejects out like a fountain and turns blue.
3. Oxidation of Ammonia gas in the absence of Catalyst. Ans: Ammonia gas burns with a green flame.
4. Catalytic oxidation of Ammonia gas. Ans: Reddish brown fumes
5. Copper sulphate solution is treated with small amounts of Ammonium hydroxide and then with excess. Ans: A pale blue precipitate is formed which turns into inky blue solution when excess Ammonium hydroxide is added.
6. Zinc sulphate solution is treated with small amounts of Ammonium hydroxide and then with excess. Ans: A gelatinous white precipitate is formed which dissolves in excess Ammonium hydroxide.
7. A solution containing Ferric ions solution is treated with small amounts of Ammonium hydroxide and then with excess. Ans: Reddish brown precipitate is formed which remains insoluble in excess Ammonium hydroxide.
8. Reaction of Ammonia gas with excess Chlorine gas. Ans: Yellow liquid is formed.
9. Excess Ammonia gas is treated with Chlorine gas. Ans: Dense white fumes
10. Copper oxide is heated with Ammonia gas. Ans: Black copper oxide turns to brown residue.
11. Ammonia gas is passed over heated Lead oxide. Ans: Silvery grey solid.
12. Warm water is added to the product formed when Magnesium is burnt in Nitrogen. Ans: A colourless gas with pungent odour which turns Nessler's reagent to reddish brown precipitate.