p-Block elementsHard
Question
With respect to graphite and diamond, which of the statement(s) given below is (are) correct?
Options
A.Graphite is harder than diamond.
B.Graphite has higher electrical conductivity than diamond.
C.Graphite has higher thermal conductivity than diamond.
D.Graphite has higher C-C bond order than diamond.
Solution
⇒ Diamond is harder than graphite.
⇒ Graphite is good conductor of electricity as each carbon is attached to three C-atoms leaving onevalency free, which is responsible for electrical conduction, while in diamond, all the four valencies ofcarbon are satisfied, hence insulator.
⇒ Diamond is better thermal conductor than graphite. Whereas electrical conduction is due to availabilityof free electrons; thermal conduction is due to transfer of thermal vibrations from atom to atom. Acompact and precisely aligned crystal like diamond thus facilitates fast movement of heat.
⇒ In graphite, C - C bond acquires double bond character, hence higher bond order than in diamond.
⇒ Graphite is good conductor of electricity as each carbon is attached to three C-atoms leaving onevalency free, which is responsible for electrical conduction, while in diamond, all the four valencies ofcarbon are satisfied, hence insulator.
⇒ Diamond is better thermal conductor than graphite. Whereas electrical conduction is due to availabilityof free electrons; thermal conduction is due to transfer of thermal vibrations from atom to atom. Acompact and precisely aligned crystal like diamond thus facilitates fast movement of heat.
⇒ In graphite, C - C bond acquires double bond character, hence higher bond order than in diamond.
Create a free account to view solution
View Solution Free