Physical Properties of Non Metals

Q.

The most abundant metal in the earths crust is

Q.

Metals are good conductors of heat because:

1. They contain a large number of free electrons

2. Their atoms are relatively apart

3. Their atoms collide frequently

4. They have a reflecting surface

Q.

Helium's subshell electron configuration is 1s². But why helium not included on S Block elements?

Q. A non-metal which is a liquid at room temperature is

1. Chlorine
2. Gallium
3. Mercury
4. Bromine​

Q.

What are bad conductors of heat. Give two examples of each.

Q.

What is meant by "brittleness"? Which type of elements usually show brittleness: metals or non-metals?

Q.

List some physical properties of aluminium.

Q.

Which of the following property is generally not shown by metals?

1. Ductility

2. Electrical conduction

3. Dullness

4. Sonority

Q.

Electrical wires have a coating of insulating material. The material, generally used is

1. Sulphur

2. Graphite

3. PVC

4. All can be used

Q.

Which of the following is not a non-metal?

1. Hydrogen

2. Carbon

3. Nitrogen

4. Sodium

Q.

Why are diamonds used in drilling and cutting equipments?

Q.

Why non-metals do not conduct electricity?

1. They have enough free electrons

2. They do not have free electrons.

3. They have a weak force of attraction

4. None of the above

Q. Helium and neon have higher ionization energies compared to the others. This means that they are .

1. very unstable
2. very stable
3. large in size

Q.

Name a Non-Metal which is very hard.

Q.

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

1. Diamond

2. Graphite

3. Sulphur

4. Fullerene

Q.

Differentiate between wrought iron and steel.

Q.

Bromine is a gaseous non-metal.

1. True
2. False

Q.

Iron, copper, lead, aluminium among these which of the metals can be drawn into wires

Q.

Write F for true and for false for the following statements

Diamond is the hardest substance known.

1. True
2. False

Q.

Write the name of a non-metal conductor of electricity.

Q.

Give two examples of Non-metals

Q.

Why non-metals are called insulators?

Q. Which among the following is a liquid non-metal?

1. Hydrogen
2. Carbon
3. Bromine
4. Mercury

Q.

………………… (Metals/Non-metals) have a large number of free electrons.

Q.

All metals are solid except

1. Calcium $\left(\mathrm{Ca}\right)$

2. Mercury $\left(\mathrm{Hg}\right)$

3. Sodium $\left(\mathrm{Na}\right)$

4. Potassium $\left(\mathrm{K}\right)$

Q.

What does the word ‘brittle’ refer to?

Q.

54. What is meant by “brittleness”? Which type of elements usually show brittleness: metals or non-metals?

Q.

Fill in the blank:

_______ is a metal in liquid form.

Q.

Which of the following metals is brittle and crumbles into powder?

1. Mercury

2. Zinc

3. Potassium

4. Calcium

Q. Select the correct answer:
Non-sonorous metal:
Lustrous non-metal:

1. Copper
2. Sodium
3. Gold
4. Iodine