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प्रश्न
The metals which can produce amphoteric oxides are ______.
विकल्प
sodium and aluminium
zinc and potassium
calcium and sodium
aluminium and zinc
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उत्तर
The metals which can produce amphoteric oxides are aluminium and zinc.
Explanation:
Amphoteric oxides are metal oxides that react with both acids and bases to form salt and water. While elements like sodium, potassium, and calcium form strictly basic oxides, aluminium and zinc can exhibit both acidic and basic behaviours. Their respective oxides (Al2O3 and ZnO) neutralise both strong acids and strong bases.
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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.
Write the electron-dot structures for sodium, oxygen and magnesium.
The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
Which of the two metals is more reactive?
Copper or silver
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
How would you show that silver is chemically less reactive than copper?
Complete and balance the following equation:
\[\ce{Na + O2 ->}\]
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.
How do metals react with hydrogen? Explain with an example.
Can we keep sodium immersed under water? Why?
Write the equation for the reaction of:
Aluminium with dilute hydrochloric acid.
Name the products formed in the given case. Also indicate the physical states of all the substances involved.
Write the equation for the reaction of:
Zinc with dilute hydrochloric acid.
Name the products formed in the given case. Also indicate the physical states of all the substances involved.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
Which of the following reactions will not occur? Why not?
- \[\ce{MgSO4_{(aq)} + Cu_{(s)} -> CuSO4_{(aq)} + Mg_{(s)}}\]
- \[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
- \[\ce{MgSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Mg_{(s)}}\]
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
