Allotropes of carbon: There are three fo...

Allotropes of carbon: There are three forms of carbon. i.e., diamond, graphite and fullerene which exxist in crystalline form. Graphite and diamond occur in nature. The structure of diamond is tetrahedral with `sp^(3)` hybridisation and diamond exist in 3-D netowrk solid. in graphite, carbon is `sp^(2)` hybridised. each carbon linked to other carbon linked to other carbon atom forms hexagonal ring. it has a layered structure. diamond and graphite are purest form of carbon. Fullerene constitute a new family of carbon allotropes.
Consisting of large spheroidal molecule of compound with general formula `C_(2n)`. common fullerene `C_(6),C_(70)`, contain 5 and 6 membered rings.
Q. Which of the following statement is correct regarding `C_(60)` fullerene?

It contains 20, six membered ring and 12, five membered rings

It consist of 25, six membered and 12, five membered rings

It consists of 12, six membered and 25, five membered rings.

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Allotropes of carbon: There are three forms of carbon. i.e., diamond, graphite and fullerene which exxist in crystalline form. Graphite and diamond occur in nature. The structure of diamond is tetrahedral with sp^(3) hybridisation and diamond exist in 3-D netowrk solid. in graphite, carbon is sp^(2) hybridised. each carbon linked to other carbon linked to other carbon atom forms hexagonal ring. it has a layered structure. diamond and graphite are purest form of carbon. Fullerene constitute a new family of carbon allotropes. Consisting of large spheroidal molecule of compound with general formula C_(2n) . common fullerene C_(6),C_(70) , contain 5 and 6 membered rings. Q. Which of the following statement is incorrect for graphite?

Its density is lower than that of diamond

It has a layered structrue and the bonding

its layers are very tightly packed, almost without any space between them

it cleaves easily between the layers which accounts for the remarkable softness of the crystals

Very small, the layers being tightly packed

Many times larger than the covalent radius of carbon

More than twice the covalent radius of carbon

The same as the covalent radius of carbon

isotopic forms of carbon

allotropic forms of carbon

amorphous forms of carbon

isometric forms of corbon