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प्रश्न
Match the salts underlined in Column A with the most suitable method of preparation given in Column B.
| Column A | Column B | ||
| (a) | \[\ce{ZnCl2 \text{from} Zn}\] | 1. | Precipitation |
| (b) | \[\ce{KNO3 \text{from} KOH}\]. | 2. | Direct combination |
| (c) | \[\ce{CaCO3 \text{from} CaCl2}\]. | 3. | Displacement reaction |
| 4. | Neutralization |
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उत्तर
| Column A | Column B | ||
| (a) | \[\ce{ZnCl2 \text{from} Zn}\] | 3. | Displacement reaction |
| (b) | \[\ce{KNO3 \text{from} KOH}\]. | 4. | Neutralization |
| (c) | \[\ce{CaCO3 \text{from} CaCl2}\]. | 1. | Precipitation |
Explanation:
- Displacement Reaction
\[\ce{Zn + HCl -> ZnCl2 + H2}\]
Displace H from HCl because zinc is more reactive than hydrogen. - Neutralization Reaction
\[\ce{KOH + HNO3 -> KNO3 + H2O}\]
\[\ce{Base + Acid -> Salt + water; Neutralization reaction}\] - Precipitation Reaction
\[\ce{CaCl2 + Na2CO3 -> 2NaCl + CaCO3 ↓}\]
Sodium chloride and a clacium carbonate precipitate follow from the double displacement reaction.
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संबंधित प्रश्न
What kind of salt prepared by direct combination. Write an equation for the reaction that takes place in preparing the salt you have named.
How is the following salt prepared:
Magnesium carbonate from magnesium chloride.
How is the following salt prepared:
Copper (II) sulphate from copper (II) oxide?
From the list of the substances given, name the substances which you would use to prepare each of the following salts:
List of substances: Copper, lead, sodium, zinc, copper oxide, lead carbonate, sodium carbonate solution, dilute hydrochloric acid, dilute nitric acid and dilute sulphuric acid.
Salts: (a) zinc sulphate (b) copper sulphate (c) sodium sulphate (d) lead sulphate.
Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron (II) sulphate
(iv) Zinc carbonate
| Dilute sulphuric acid |
Copper, Iron, |
Copper carbonate, Sodium carbonate |
Write the equation for the laboratory preparation of sodium sulphate using dilute sulphuric acid.
Carbon dioxide and sulphur dioxide gas can be distinguished by using ______.
Write the equations for the reaction to prepare lead sulphate from lead carbonate.
The following is a list of methods for the preparation of salts.
A – direct combination of two elements.
B – reaction of a dilute acid with a metal.
C – reaction of a dilute acid with an insoluble base.
D – titration of a dilute acid with a solution of soluble base.
E – reaction of two solutions of salts to form a precipitate.
Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:
Sodium sulphate.
Select the word/s given which are required to correctly complete the blanks.
When solution M and O are mixed together, the products will be ______ and ______.
