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प्रश्न
Out of the following oxides, the amphoteric oxide is:
पर्याय
Fe2O3
Al2O3
P2O5
N2O
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उत्तर
Al2O3
Explanation:
Aluminium oxide (Al2O3) is an amphoteric oxide because it possesses both acidic and basic properties. It reacts chemically with acids (such as hydrochloric acid) to form aluminium chloride and water, and similarly reacts with strong bases (such as sodium hydroxide) to yield sodium aluminate and water. By contrast, Fe2O3 is basic, P2O5 is acidic, and N2O is a neutral oxide.
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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.
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Which of the two metals is more reactive?
Copper or silver
Complete and balance the following equation:
\[\ce{Fe_{(s)} + H2O_{(g)} ->[Red heat]}\]
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
How do metals react with hydrogen? Explain with an example.
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.
Name two metals which cannot displace hydrogen from dilute acids.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
Name one metal which displaces copper from copper sulphate solution.
Which non-metal has been placed in the reactivity series of metals?
Out of aluminium, copper, calcium and tin, the most reactive metal is ______.
The metals which can produce amphoteric oxides are ______.
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
- What is the nature of the oxide E2O?
- State whether element E is a metal or a non-metal.
- Give one example of an element like E.
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
