Some properties are listed in the following table. Distinguish between metals and non-metals on the basis of these properties.

Properties	Metals	Non-metals
(a) Appearance
(b) Hardness
(c) Malleability
(d) Ductility
(e) Heat conduction
(f) Conduction of electricity

3

(a)

Can you store lemon pickle in an aluminium utensil? Explain

3

(a)

What happens when
(a) dilute sulphuric acid is poured on a copper plate?
(b) iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.

3

(a)

Explain why copper vessel acquires a dull green coating.

3

(a)

What happens when samples of metals and non-metals react with acids?

3

(a)

If a blacksmith beats an iron piece with hammer. Do you think, will it Change its shape? If yes, would you expect a similar Change in woodlog on beating?

3

(a)

In what form magnesium is found in plants?

3

(a)

A more reactive metal displaces the less reactive metal from its salt solution. What do you mean by this reaction?

3

(a)

Shikha bought a new iron container and kept blue copper sulphate solution in it. Next day, she found that blue colour of copper sulphate solution fades and iron container becomes porous. She went to the shopkeeper and complaint that iron container is not of good quality. But the shopkeeper argued that container is of good quality and he is not giving her money back, By chance, her friend Mohan came there and asked the matter, and told that the container is of good quality and you have kept the wrong substances in it, so fault is all yours.
On the basis of the above passage answer the following questions.
(a) Why the container becomes porous when blue copper sulphate solution is kept in it?
(b) What qualities are exhibited by Mohan.

3

(a)

What do you understand by displacement reactions? What happens when copper sulphate reacts with zinc? Explain this reaction also.

3

(a)

Write three important uses of non-metals

3

(a)

How are acids and bases formed?

3

(a)

Discuss all the physical properties of metals

3

(a)

Take a piece of burning charcoal and collect the gas evolved in a test-tube.
(i) Find the nature of gas.
(ii) Write down word equations of all the reactions taking place in this process

3

(a)