Some uses of diamond is given below. Analyse the uses and answer the following questions:
i) Used to make ornaments.
ii) Used for cutting glass.
a) Which are the properties of doamond that made it useful for these purposes?
b) What could be the reason for the peculiar properties of diamond?
c) Write another two properties of diamond.

Explanation

a)i)Transparent
ii) Hardness
b) In structure of diamond each carbon is linked with other four carbon atoms covalently. This strong bonding is responsible for the hardness of the diamond. Due to the absence of free electron in the structure, diamond is not a good conductor of electricity.
c) i) High thermal conductivity
ii) High refractive index