Advertisements
Advertisements
Question
Name the following:
A chemical in which gold can be dissolved.
Advertisements
Solution
Gold can be dissolved in aqua regia which is mixture of three parts of conoentrated hydrochloric acid and one part of concentrated nitric acid.
APPEARS IN
RELATED QUESTIONS
Write an equation for the reaction of hydrochloric acid on caustic soda solution.
Write an equation for the reaction of hydrochloric acid on copper oxide.
How will the action of dilute hydrochloric acid enable you to distinguish between sodium carbonate and sodium sulphite?
How will the action of dilute hydrochloric acid enable you to distinguish between sodium thiosulphate and sodium sulphite?
State the composition of aqua regia. State which component is the oxidizing agent in aqua regia.
Name the following:
Five oxidizing agents that liberated chlorine from concentrated hydrochloric acid.
How will you identify?
An amphoteric hydroxide
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.
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.
