Question

Choose the correct option regarding the statements given below:

Statement 1 : Graphite is used in dry cells that are present in electric motors.
Statement 2 : Graphite is a bad conductor of heat.

• A. Statement 1 and statement 2 are true.
• B. Statement 1 and statement 2 are false.
• C. Statement 1 is true but statement 2 is false.
• D. Statement 1 is false but statement is true.

Answer 1

The correct option is C Statement 1 is true but statement 2 is false.

Graphite is formed by carbon bonding in hexagonal arrays in which every carbon atom is covalently joined to three other carbon atoms. The layers of these carbon atoms are stacked over one another. Since all the carbon atoms in graphite are bonded to three other carbon atoms and the fourth electron is free to move the mobility of these delocalised electrons from all the carbon atoms between the layers helps in conducting electricity.

So, graphite is a good conductor of electricity and is used in dry cells present in electric motors. Hence, statement 1 is true but statement 2 is false.