Exceptions in Physical Properties

Q.

Name the metal that can be easily cut by knife.

Q.

Non-metals are generally good conductors of heat and electricity.

1. True
2. False

Q.

Which of the following non metal is lustrous?

1. Boron

2. Carbon

3. Bromine

4. Iodine

Q.

Name a non-metal having properties similar to carbon.

Q.

Which non metal has a shining surface?

1. Iodine

2. Phosphorus

3. Sulphur

4. Chlorine

Q.

Metalloid among the following is -

1. lithium

2. sulphur

3. sodium

4. silicon

Q.

Name a metal and a non-metal which exists as a liquid at room temperature.

Q.

State whether the following statement is true or false.

"Sodium can be cut by knife and thus, it is a metalloid."

1. True

2. False

Q.

41) Which non-metal is used for manufacture of pencil lead

Q. Identify the metals, non-metals and metalloids from the following elements.

Q.

Graphite is a form of

1. carbon

2. pure element

3. metal

4. metalloid

Q. The allotrope of carbon that is a good conductor of heat is:

1. diamond
2. graphite
3. wood charcoal
4. coke

Q.

34) Mention some specific properties of metals

Q.

Graphite is used to prepare ______.