Allotropes

Q. Porcelain is a non-porous ceramic.

1. True
2. False

Q.

Identify the true statement from the following

1. All metals have fixed melting points whereas non metals do not

2. All metals are malleable

3. The hardest substance known is a non-metal

4. Tungsten is a good conductor of heat and electricity.

Q. is a non-metal that can conduct electricity.

1. Sodium
2. Calcium
3. Graphite
4. Diamond

Q. Which of the following is a non-metal but conducts electricity?

1. Gold
2. Mercury
3. Carbon
4. Iron