ICSE Class 10 Answered
What do you observe when:(i) Concentrated sulphuric acid is added to sugar crystals? (ii) Ammonia mixes with Hydrogen chloride gas? (iii) Dilute Hydrochloric acid is added to Sodium carbonate solution? (iv) Ammonium hydroxide is added to Zinc nitrate solution, first a little and then in excess? (v) Sulphur dioxide is passed through acidified Potassium dichromate solution?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(i) First the sugar turns brown then it swells to give steam and finally gets charred.
(ii) Dense white fumes are seen.
(iii) A colourless and odourless gas evolves with brisk effervescence which turns lime water milky.
(iv) On adding a little Ammonium hydroxide, white precipitate of zinc hydroxide is formed which dissolves in excess of Ammonium hydroxide to give clear solution.
(v) The solution becomes green.
(ii) Dense white fumes are seen.
(iii) A colourless and odourless gas evolves with brisk effervescence which turns lime water milky.
(iv) On adding a little Ammonium hydroxide, white precipitate of zinc hydroxide is formed which dissolves in excess of Ammonium hydroxide to give clear solution.
(v) The solution becomes green.
Answered by | 04 Jun, 2014, 03:23: PM
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