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NEET 2022 Physics and Chemistry
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© examsnet.com
Question : 70
Total: 100
Choose the correct statement:
[NEET-2022]
Diamond and graphite have two dimensional network.
Diamond is covalent and graphite is ionic.
Diamond is
s
p
3
hybridised and graphite is
s
p
2
hybridized.
Both diamond and graphite are used as dry lubricants.
Validate
Solution:
👈: Video Solution
The correct statement about diamond and graphite is "Diamond is
mathrm
s
p
3
hybridized and graphite is sp
2
hybridized".As in diamond -
- 3-D structures of carbon atoms joined together by covalent bonds are found.
- Each carbon atom is tetrahedrally connected to other carbon atoms with a covalent bond.
- Thus, the hybridization of each carbon atom in diamond is
s
p
3
.
In the case of graphite -
- It is a 2-D structure of carbon atoms joined together in form of layers of graphene.
- each carbon atom is connected to three other carbon atoms, by
3
σ
and
1
π
bonds.
- Thus, the hybridization of each carbon atom in graphite is
s
p
2
.
Other statements are incorrect as-
- Diamond cannot be used as a dry lubricant because of its extreme hardness.
- Both diamond and graphite are covalent solid.
- Diamond is a 3-D structure and graphite is 2-D.
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