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प्रश्न
State the use of aqua-regia.
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उत्तर
It is used to dissolve noble metals like gold and platinum.
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संबंधित प्रश्न
Potassium sulfite on reacting with hydrochloric acid releases _______ gas. (Cl2, SO2, H2S)
The acid on mixing with silver nitrate solution produces a white precipitate which is soluble in excess ammonium hydroxide
Dry hydrogen chloride gas can be collected by ______ displacement of air.
Write an equation for the reaction of hydrochloric acid on zinc carbonate.
Convert two soluble metallic nitrates to insoluble metallic chlorides using dil. HCl.
Match the following:
| Column A | Column B |
| 1. A substance that turns moist starch iodide paper blue. | A. Ammonium sulphate |
| 2. A compound which release a reddish brown gas on reaction with concentrated sulphuric acid and copper turnings. | B. Lead carbonate |
| 3. A solution of this compound gives dirty green precipitate with sodium hydroxide. | C. Chlorine |
| 4. A compound which on heating with sodium hydroxide produces a gas which forms dense white fumes with hydrogen chloride. | D. Copper nitrate |
| 5. A white solid which gives a yellow residue on heating | E. Ferrous sulphate |
Write the balanced equation for the reaction of dilute hydrochloric acid with the following:
Iron (II) sulphide
Write the balanced equation for the reaction of dilute hydrochloric acid with the following:
Magnesium sulphite
Write observation:
Lead nitrate solution is mixed with dilute hydrochloric acid and heated.
State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.
