Which of the following is purest form of carbon?

Option 1 : Coke

Explanation:

Forms of carbon:- 

• Forms of carbon are also known as allotropes of carbon.
• Carbon occurs in the earth in many forms like graphite, diamond, fullerenes and amorphous forms of carbon.
• Carbon is extracted from various minerals as well.
• Petroleum deposits also contain different forms of carbon.
• Coke is considered the purest form of carbon as 98% of coke is carbon.
• Coke is obtained by heating coal for a long time.
• Coke is a mineral form of carbon.

• Coal Tar: It is a thick black liquid produced as a by-product in the preparation of coal gas and coke. It has 78% of carbon in it.
• Coal Gas: It is a flammable gaseous fuel made from coal. It is the gaseous mixture of hydrogen, methane and carbon monoxide. It has 10% of carbon in it.
• Charcoal: It is a black carbon residue that is light in weight. Charcoal has 10 % of carbon.