Which of the following is the chemically inactive allotropic form of carbon?
diamond
Allotropy is defined as the existence of chemical elements in two or more different forms.
Carbon exists in three main allotropes; graphite, diamond, fullerene.
Diamond is an allotrope of carbon. It is a non-conductor of electricity due to its covalent nature.
Diamond is chemically inert because it is hard and incompressible in nature.
Diamond is chemically inactive to react with chemical reagents at room temperature.
Charcoal is a type of fuel generated when the wood is burned in an incomplete manner. So, it can easily react with chemical reagents.
Coke is a calcined or dry-distilled fuel manufactured from mineral coal. It is a chemically activated allotrope of carbon.
Hence, option (A) is the correct option.