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प्रश्न
Which of the following reactions will not occur? Why not?
- \[\ce{MgSO4_{(aq)} + Cu_{(s)} -> CuSO4_{(aq)} + Mg_{(s)}}\]
- \[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
- \[\ce{MgSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Mg_{(s)}}\]
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उत्तर
Reactions (a) and (c) will not occur because copper is less reactive than magnesium. So, it cannot displace magnesium from its salt solution, the equation of which is shown in reaction (a). Similarly, iron is less reactive than magnesium. So, it cannot displace magnesium from its salt solution, the equation of which is shown in reaction (c).
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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.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be ______.
The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
With the help of examples, describe how metal oxides differ from non-metal oxides.
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
A copper plate was dipped in AgNO3 solution. After certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.
Why does aluminium not react with water under ordinary conditions?
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
What special name is given to substances like aluminium oxide?
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?
A basic oxide will be formed by the element ______.
Out of aluminium, copper, calcium and tin, the most reactive metal is ______.
Out of the following oxides, the amphoteric oxide is:
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
\[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
\[\ce{FeSO4_{(aq)} + Zn_{(s)} -> ZnSO4_{(aq)} + Fe_{(s)}}\]
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
The substance that will be flattened on beating with a hammer is ______.
Which of the following property is not responsible for copper to be used as electrical conduction wires?
