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प्रश्न
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
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उत्तर
(i) Magnesium reacts with water only on boiling.
(ii) Copper does not react even with steam.
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संबंधित प्रश्न
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
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.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Write equation for the reaction of magnesium with oxygen.
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
Complete and balance the following equation:
Na + O2 →
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
With the help of examples, describe how metal oxides differ from non-metal oxides.
Which of the following elements would yield an acidic oxide.
Na, S, C, K, H
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
What is the action of water on sodium ? Write equation of the chemical reaction involved.
Name one metal which displaces silver from silver nitrate solution and one which does not.
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
Name a metal which It does not react with any physical state of water?
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?
Where does the metal aluminium, used in the process, occurs in the reactivity series of metals?
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
