(a) What is the action on litmus of: (i) Dry ammonia gas. (ii) Solution of ammonia gas in water

CBSE Class 10 CBSE Class 10 Science
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(a) What is the action on litmus of:

  1. Dry ammonia gas.
  2. Solution of ammonia gas in water.

(b) State the observations you would make on adding ammonium hydroxide to aqueous solutions of:

  1. Ferrous Sulphate.
  2. Aluminium chloride.
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(a)

  1. No action.
    2.Solution of ammonia gas in water turns red litmus to blue. It behaves as a base.

(b)

  1. When ammonium hydroxide is added to ferrous sulphate, a dirty green precipitate of iron (11) hydroxide is produced.
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  2. When ammonium hydroxide is added to the solution of aluminium chloride, a gelationous white precipitate of aluminium hydroxide is obtained.
    image