Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?

1

(a)

Iron

(b)

Sodium

(c)

Gold

(d)

Magnesium

Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?

1

(a)

Magnesium

(b)

Aluminium

(c)

Iron

(d)

Copper

Which of the following non-metals reacts and catches fire on exposure to air?

1

(a)

Phosphorus

(b)

Nitrogen

(c)

Sulphur

(d)

Hydrogen

...................foils are used to wrap food items

1

(a)

Aluminium

.................gas is liberated when metals react with acids.

1

(a)

Hydrogen

Copper displaces zinc from zinc sulphate solution

1

(a) True

(b) False

Iron is used in constructing bridges and houses

1

(a) False

(b) True

Sodium is a very reactive metal

1

(a) True

(b) False

Carbon can be drawn into wires.

1

(a) True

(b) False

Name two major non-metals which are present in fertilisers and enhance the growth of plants.

2

(a)

Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?

2

(a)

Some non-metals like phosphorus are kept in water to protect them from atmospheric oxygen. Write the property of non-metals utilised here.

2

(a)

Can you store lemon pickle in an aluminium utensil? Explain

3

(a)

We should not store food stuff in container which is made up of metals such as copper, zinc, aluminium, etc. Why?

3

(a)

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

3

(a)

Iron is more reactive than copper. Can you write an activity to show this?

5

(a)