Question

Which of the following statements are incorrect about diamond?

• A. It has a high melting point.
• B. It cannot reflect light falling on it.
• C. It is a good conductor of electricity.
• D. It is used for cutting glasses.

Answer 1

Answer: (B), (C)

The correct options are
B It cannot reflect light falling on it.
C It is a good conductor of electricity.

Some of the main charecteristics of diamond are:

$\bullet$ Properly cut diamond reflects most of the light falling on it. This makes it shine.

$\bullet$ There is no free electron in the diamond crystal to carry electricity. Thus, diamond is a bad conductor of electricity.

​​​​​​​$\bullet$ In order to break strong C-C covalent bonds present in diamond, a large amount of energy is required. Hence, the melting point of diamond is very high.

​​​​​​​​​​​​​​$\bullet$ Since diamond is very hard, it is used for cutting glasses and drilling rocks.