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प्रश्न
What is meant by the reactivity series of metals?
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उत्तर
The arrangement of metals in a vertical column in the order of decreasing reactivities is called the reactivity series of metals (or activity series of metals). In the reactivity series, the most reactive metal is placed at the top, whereas the least reactive metal is placed at the bottom.
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संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
Write equations for the reactions of iron with steam.
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.
Write the chemical reaction when iron reacts with dilute H2SO4.
The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
Why are metals called electropositive elements?
Which of the two metals is more reactive?
Copper or silver
Complete and balance the following equation:
\[\ce{Na + O2 ->}\]
Which of the following elements would yield an acidic oxide?
Na, S, C, K, H
Which of the following elements would yield a basic oxide?
Na, S, C, K, H
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
What special name is given to substances like aluminium oxide?
Which non-metal has been placed in the reactivity series of metals?
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
Which of the following reactions will not occur? Why not?
- \[\ce{MgSO4_{(aq)} + Cu_{(s)} -> CuSO4_{(aq)} + Mg_{(s)}}\]
- \[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
- \[\ce{MgSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Mg_{(s)}}\]
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
