Advertisements
Advertisements
प्रश्न
Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
Advertisements
उत्तर
1. Aluminium oxide reacts with hydrochloric acid to form aluminium chloride (salt) and water.
\[\ce{\underset{Aluminium oxide}{Al2O3_{(s)}} + \underset{(Acid)}{\underset{Hydrochloric acid}{6HCl_{(aq)}}} -> \underset{(Salt)}{\underset{Aluminium chloride}{2AlCl3_{(aq)}}} + \underset{Water}{3H2O_{(l)}}}\]
In this reaction, aluminium oxide behaves as a basic oxide (because it reacts with an acid to form a salt and water).
2. Aluminium oxide reacts with sodium hydroxide to form sodium aluminate (salt) and water.
\[\ce{\underset{Aluminium oxide}{Al2O3_{(s)}} + \underset{(Base)}{\underset{Sodium hydroxide}{2NaOH_{(aq)}}} -> \underset{(Salt)}{\underset{Sodium aluminate}{2NaAlO2_{(aq)}}} + \underset{Water}{H2O_{(l)}}}\]
In this reaction, aluminium oxide behaves as an acidic oxide (because it reacts with a base to form a salt and water).
APPEARS IN
संबंधित प्रश्न
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
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?
Give reasons for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
What is the action of water on magnesium? Write equations of the chemical reactions involved.
You are given samples of three metals - sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.
Which non-metal has been placed in the reactivity series of metals?
A basic oxide will be formed by the element ______.
A metal less reactive and another metal more reactive than hydrogen are ______.
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be ______.
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
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.
- What is the nature of oxide XO?
- What is the nature of oxide ХО2?
- Would you call element X a metal or a non-metal? Give reason for your choice.
- Can you give an example of element like X?
State and explain the reaction of the following metal with a solution of copper sulphate:
Gold
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
What is the characteristic of the electronic configuration of noble gases?
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
A cable manufacturing unit tested few elements on the basisof their physical properties.
| Properties | W | X | Y | Z |
| Malleable | Yes | No | No | Yes |
| Ductile | Yes | No | No | Yes |
| Electrical conductivity | Yes | Yes | Yes | No |
| Melting Point | High | Low | Low | High |
Which of the above elements were dicarded for usage by the company?
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
