CLASS 8 Chapter 4 Metals and Non- Metals

Short answer type questions

Question 1. Name two physical and chemical properties of materials.

Question 2. How can we group materials into good and bad conductors of electricity?

Question 3. What do you understand by non-metals?

Question 4. Define the term sonorous.

Question 5. What happens to a copper vessel when it is exposed to moisture for a long time?

Question 6. What happens when Sulphur dioxide dissolves in water? Give the reaction.

Question 7.  Write two displacement reactions.

Question 8. What does the pop sound indicate during the reaction of metal with bases?

Long answer type questions

Question 1. Describe the following properties of metals

1. Malleability
2. Ductility

Question 2.  What do you understand by the good and bad conductors?

Question 3.  Give reasons for the following

1. Sodium and potassium are stored in kerosene.
2. Aluminium foils are used to wrap food items.

Question 4. What happens when dilute sulphuric acid is poured on a copper plate? Give the equation of the reaction.

Question 5.  What happens when Sulphur reacts with oxygen? Name the product that formed during this reaction.

Question 6. What are displacement reactions? Represent one reaction.

Question 7. Write five uses of non-metals.