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प्रश्न
State the use of aqua-regia.
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)
State one relevant observation for given reactions:
Action of dilute Hydrochloric acid on iron (II) sulfide.
State your observation when dilute hydrochloric acid is added to a lead nitrate solution and the mixture is heated.
Select from the list the gas that matches the description given in case
[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]
This gas has a characteristic rotten egg smell.
Write an equation for the reaction of hydrochloric acid on the silver nitrate solution.
Give three distinct test [apart from using an indicator] you would carry out with solution of \[\ce{HCl}\] to illustrate the typical properties of an acid.
Write balanced equcation for the following reaction:
Manganese (IV) oxide and concentrated hydrochloric acid.
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 observation:
A small piece of zinc is added to dilute hydrochloric acid.
Write an equation for the reaction of hydrochloric acid on manganese (IV) oxide.
