The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilized by plants in photosynthesis. An allotrope C of this element is used in glass cutters.

(a) What is element A?


(b) What is the gas B?


(c) Name the allotrope C.


(d) State another use of allotrope C (other than in glass cutters)


(e) Name another allotrope of element A which exists as spherical molecules.


(f) Name a yet another allotrope of element A which conducts electricity.

(a) Element A is carbon.

(b) The gas B is carbon dioxide (CO2).


(c) The allotrope C is diamond.


(d) Allotrope C is used for making jewellery.


(e) Buckministerfullerence is also allotrope of carbon which exists as spherical molecules.


(f) Graphite is an allotrope of carbon which conducts electricity.


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