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प्रश्न
State and explain the reaction, if any, of the following metals with a solution of copper sulphate:
(a) Gold
(b) Copper
(c) Zinc
(d) Mercury
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उत्तर
(a) Gold, being less reactive than copper, cannot displace copper from copper sulphate solution and hence, no reaction occurs.
(b) Copper reacts with copper sulphate to form copper and copper sulphate solution. So, practically no reaction occurs between them.
(c) Zinc is more reactive than copper and hence, displaces copper from its solution to form zinc sulphate solution and copper metal.
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
(d) Mercury, being less reactive than copper, cannot displace copper from copper sulphate solution and hence, no reaction occurs.
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संबंधित प्रश्न
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Cooper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ||
| B | Displacement | No reaction | ||
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
Name the metal which has been placed at the top of the reactivity series.
Complete and balance the following equation:
Na2O + H2O →
Complete and balance the following equation:
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
How do metals react with hydrogen? Explain with an example.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
What is the action of water on aluminium ? Write equation of the chemical reaction involved.
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Write the chemical equation of the above process.
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
Which of the following property is not responsible for copper to be used as electrical conduction wires?
