Advertisements
Advertisements
प्रश्न
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
Advertisements
उत्तर
When non-metals react with oxygen, acidic oxides are formed. For example, sulphur on reacting with oxygen form sulphur dioxide. This oxide turns blue litmus solution to red, which shows that it is an acidic oxide.
APPEARS IN
संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
What name is given to those metal oxides which show basic as well as acidic behaviour?
Name two metals which form amphoteric oxides.
Name the metal which has been placed just below copper in the reactivity series.
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
How would you show that silver is chemically less reactive than copper?
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
Why does aluminium not react with water under ordinary conditions?
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 another metal oxide which behaves like aluminium oxide.
Name one metal which displaces copper from copper sulphate solution and one which does not.
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
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.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
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
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
