Question

Among the following the non-metal which is very hard is
1. Graphite 2. Diamond 3. Aluminium 4. Iron​

Answer 1

★Answer:-

Diamond is the hardest non-metal.

★Explanation:-

Let's understand about every option!

~Diamond

Diamond is an allotrope of carbon and is the only non-metal which is hard. Even it is the hardest substance. It can be considered as an exception of non-metal.

~Graphite

Graphite is also an allotrope of carbon and is known as the only non metal to conduct electricity, it is also an allotrope of carbon.

~Aluminium

Aluminium is a metal. It's major property include that it's oxide shows both acidic as well as basic behaviour known as amphoteric oxide.

~Iron

Iron is a metal, which is very common on earth. It's main property is that it is a Magnetic material which can be attracted by a magnet and can even magnetised.