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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.
संबंधित प्रश्न
Choose the method of preparation of the following salts, from the methods given in the list:
[List : A. Neutralization B. Precipitation C. Direct combination D. Substitution ]
(i) Lead chloride
(ii) Iron (II) sulphate
(iii) Sodium nitrate
(iv) Iron (III) chloride
Explain hydronium ion. Write the ionization of sulphuric acid showing the formation of hydronium ion.
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
lead sulphate using dilute sulphuric acid.
Match the salts given in Column I with their method of preparation given in Column II:
| Column I | Column II | ||
| (i) | Pb(NO3)2 from PbO | (a) | Simple displacement |
| (ii) | MgCl2 from Mg | (b) | Titration |
| (iii) | FeCl3 from Fe | (c) | Neutralization |
| (iv) | NaNO3 from NaOH | (d) | Precipitation |
| (v) | ZnCO3 from ZnSO4 | (e) | Combination |
Write the equation for the following reaction:
Magnesium sulphate solution is mixed with barium chloride solution.
Give the equation for the preparation of the following salt from the starting material given.
Copper sulphate from copper (II) oxide
Name the method used for preparation of the following salts from the list given below:
(i) Sodium nitrate
(ii) Iron (III) chloride
(iii) Lead chloride
(iv) Zinc sulphate
(v) Sodium hydrogen sulphate
List :
(a) Simple displacement
(b) Neutralization
(c) Decomposition by acid
(d) Double decomposition
(e) Direct synthesis
What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
Explain the following method with example.
Direct combination
Choose the most appropriate answer from
(SO2, SiO2, Al2O3, CO, MgO, Na2O)
An oxide which when dissolved in water form acid.
