Question

36 a) What are silicones?
b) Write a short note on Fullerenes
c) Why graphite is conducting in nature?
d) What is the hybridization of 'C' in diamond?​

Answer 1

Answer:

(a) silicone or polysiloxane is a polymer made up of siloxane. They are typically colorless, oils or rubber-like substances. Silicones are used in sealants, adhesives, lubricants, medicine, cooking utensils, and thermal and electrical insulation.

(b) A fullerene is an allotrope of carbon whose molecule consists of carbon atoms connected by single and double bonds so as to form a closed or partially closed mesh, with fused rings of five to seven atoms. ... Cylindrical fullerenes are also called carbon nanotubes or buckytubes.

(c)Graphite can conduct electricity because of the delocalised (free) electrons in its structure. These arise because each carbon atom is only bonded to 3 other carbon atoms. ... However, in diamond, all 4 outer electrons on each carbon atom are used in covalent bonding, so there are no delocalised electrons.

(d)In diamond each carbon atom is attached to four different carbon atoms by sigma bonds. Hence, the hybridization of carbon is sp3 .

Answer 2

A) A silicone is a polymer made up of siloxane. They are typically colorless, oils or rubber-like substances.

B) A fullerene is an allotrope of carbon whose molecule consists of carbon atoms connected by single and double bonds so as to form a closed or partially closed mesh, with fused rings of five to seven atoms. The molecule may be a hollow sphere, ellipsoid, tube, or many other shapes and sizes.

C) Graphite is conducting in nature because graphite can conduct electricity because of the delocalised (free) electrons in its structure

D) In diamond each carbon atom is attached to four different carbon atoms by sigma bonds. Hence, the hybridization of carbon is sp3 .