Chemistry
Match the salts underlined in Column A with the most suitable method of preparation given in Column B.
| Column A | Column B |
|---|---|
| (a) ZnCl2 from Zn | 1. Precipitation |
| (b) KNO3 from KOH | 2. Direct combination |
| (c) CaCO3 from CaCl2 | 3. Displacement reaction |
| 4. Neutralization |
Related Questions
The following table shows the electronic configuration of the atoms A, B, C and D.
Element A B C D Electronic configuration 2, 8, 8, 2 2, 6 2, 8, 7 2, 4 (a) Write the formula of the compound formed between:
- A and B
- D and C
(b) Which of the above elements will exhibit catenation?
Give balanced equation for the following reactions:
(a) Copper reacts with concentrated Nitric acid.
(b) Aluminium nitride is treated with warm water.
Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
(a) Give balanced chemical equation for the above reaction.
(b) State the method of collection of the gas formed above.
(c) What is the property of sulphuric acid that makes it a suitable reagent for the reaction?