Which of the following statements is correct?

1

(a)

All metals are ductile

(b)

All non-metals are ductile

(c)

Generally, metals are ductile

(d)

Some non-metals are ductile

Which of the following is not a metal?

1

(a)

Copper

(b)

Sulphur

(c)

Aluminium

(d)

Iron

The substance that will be flattened on beating with a hammer is

1

(a)

crystal of iodine

(b)

lump of sulphur

(c)

piece of coal

(d)

zinc granule

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 can be cut with a knife:

1

(a)

Sodium and iron

(b)

Potassium and copper

(c)

Copper and iron

(d)

Sodium and potassium.

Sulphurous acid turns blue litmus paper into

1

(a)

Blue

(b)

Red

(c)

Neutral

(d)

No reaction

Sodium metal is stored in

1

(a)

Oil

(b)

Petrol

(c)

Kerosene

(d)

Diesel

Some metals react with bases to produce gas:

1

(a)

Oxygen

(b)

Nitrogen

(c)

Hydrogen

(d)

Carbon dioxide

Which statement is not correct for non-metals?

1

(a)

Non-metals do not react with acids

(b)

Non-metals are not ductile

(c)

Non-metals are not sonorous

(d)

Non-metals can be drawn into wires

Metals are not used in making:

1

(a)

Machinery

(b)

An antiseptic

(c)

Satellite

(d)

Utensils.

..................litmus paper turns...............when it is dipped in a basic solution.

1

(a)

Red,blue

A solution of...............in alcohol has antiseptic properties.

1

(a)

iodine

Nitrates of.............find use in photography

1

(a)

silver

Non-metals are used in the purple coloured solutions that are applied on ______ as an ______

1

(a)

Wounds, antiseptic

A more reactive __________ can replace a _________ metal.

1

(a)

Metal, less reactive

Articles made up of metals produce ringing sound when struck hard.

1

(a) False

(b) True

Oxides of non-metals and metals are acidic in nature.

1

(a) True

(b) False

A less reactive metal displaces a more reactive metal from its salt solution in water.

1

(a) True

(b) False

Metals are not essential for our life

1

(a) True

(b) False

A more reactive metal can replace a less active metal.

1

(a) False

(b) True

Name the metal that is found in liquid state at room temperature.

1

(a)

Mercury

How are metal oxides formed?

1

(a)

Metal oxides are formed when metals react with oxygen

Why is immersion rod used for heating liquids made of metallic substances?

1

(a)

It is because metallic substances are good conductors of electricity

Why are Sodium and potassium stored in kerosene?

1

(a)

It is because they react vigorously with oxygen and water

Why copper cannot displace zinc from its salt solution?

1

(a)

It is because zinc is more reactive than copper.