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प्रश्न
What is the function of HCI in preparation of aqua-regia?
उत्तर
HCI dissolves noble metals like gold and platinum. HCI with HNO3 reacts to produce nascent chlorine which reacts with gold, platinum etc. to form their respective chiorides.
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संबंधित प्रश्न
State one relevant observation for given reactions:
Action of dilute Hydrochloric acid on iron (II) sulfide.
Write balanced chemical equations to show The behavior of H2SO4 as an acid when it reacts with Magnesium
State your observations when Dilute Hydrochloric acid is added to Copper carbonate
State your observation When moist starch iodide paper is introduced into chlorine gas.
State which component is the oxidizing agent in aqua regia.
Name the following:
Salt obtained by heating sodium chloride with concentrated sulphuric acid below 200 degree celcius.
Write the balanced equation for the reaction of dilute hydrochloric acid with the following:
Magnesium sulphite
State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.
A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution :
| S.NO. | Substances added | Gas evolved | Odour |
| 1. | Calcium carbonate | ______ | ______ |
| 2. | Magnesium ribbon | ______ | ______ |
| 3. | Manganese (IV) oxide with heating | ______ | ______ |
| 4. | Sodium sulphide | ______ | ______ |
Complete the table by writing the gas evolved in each case and its odour.
State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.
