Properties of Metals

Q.

Why we should not cook food in aluminum utensils?

Q.

Why magnesium ribbon is rubbed with sandpaper before burning it?

1. Generate heat

2. Support burning

3. Remove oxide layer from the surface

4. Remove moisture from the surface

Q.

Why does sulphur dissolve when carbon disulphide is added to mixture of iron and sulphur but not when it is dissolved in iron sulphide.

Q.

A substance which can be beaten into thin sheets is known as ____________.

1. malleable substances

2. good conductor

3. ductile substances

4. bad conductor

Q.

The property of a metal having a shining surface is called its luster

1. True
2. False

Q.

Food is wrapped in aluminum foils. The aluminium is converted into foils due to its:

1. Property of Malleability

2. Property of sonority

3. Property of ductility

4. Property of conduction of heat

Q.

Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is a nonmetal?

1. Iron nail

2. Aluminium wire

3. Copperplate

4. Piece of coal

Q.

12 (a) What are metalloids . Name at least three metalloids

Q.

Element A is highly malleable and element B is highly ductile. Raghu wants to cover the surface of his small model of car with one of these elements. Which element should he choose?

1. A.

2. B

3. Both A and B

4. Neither A nor B

Q. Which amongst the following substances is lustrous?

(a) Plastic
(b) Gold
(c) Wood
(d) Sand (1 Mark)

Q.

What term defines a material's ability to get converted to sheets?

1. Malleability

2. Ductility

3. Hardness

4. Solubility

Q.

The ability of a substance to get converted to wires is called _______.

1. Ductility

2. Hardness

3. Malleability

4. Rigidity

Q. Iron (Roman II) oxide what do you mean by (II)

Q. Metals in their pure state, have shining surfaces. What is this property that makes metals shine called?

1. Malleability
2. Ductility
3. Sonorous
4. Lustre

Q. Metals produce a sound on striking a hard surface. What is this property of metals known as?

1. Malleability
2. Ductility
3. Hardness
4. Sonority

Q.

The properties of _________ are ductility and mallebility.
__________ are poor conductors of heat and electricity.
__________ has intermediate properties.

1. non-metals, metalloids, metals

2. metals, metalloids, non-metals

3. metals, non-metals, metalloids

4. non-metals, metals, metalloids