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प्रश्न
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
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उत्तर
When a metal reacts with dilute hydrochloric acid, it forms a metal chloride salt and hydrogen gas.
For example, sodium reacts with dilute hydrochloric acid to form sodium chloride salt and hydrogen gas.
2Na(s) + 2HCl(aq) → 2NaCl(aq) + H2(g)
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संबंधित प्रश्न
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
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).
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
With the help of examples, describe how metal oxides differ from non-metal oxides.
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
Name one metal which displaces copper from copper sulphate solution and one which does not.
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
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.
Name a metal which It does not react with any physical state of water?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Write the name and formula of a molecule made up of three atoms of oxygen.
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
