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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.
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उत्तर
- B is most reactive metal.
- If metal B is added to copper (II) sulphate solution, it will displace copper.
- Arrangement of metals in the order of decreasing reactivity B > A > C > D.
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संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Complete and balance the following equation:
Na2O + H2O →
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:
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ................. on the surface of aluminium.
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
What special name is given to substances like aluminium oxide.
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
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
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
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?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
Which of the following property is not responsible for copper to be used as electrical conduction wires?
