General Knowledge - General Science - Discussion

Discussion Forum : General Science - Elements and Metals (Q.No. 23)
23.
Among the various allotropes of carbon,
coke is the hardest, graphite is the softest
diamond is the hardest, coke is the softest
diamond is the hardest, graphite is the softest
diamond is the hardest, lamp black is the softest
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
32 comments Page 2 of 4.

Elue above said:   7 years ago
No, lampblack is the softest its formed by burning lamp it produces the deposit of carbon which is in amorphous form like powder.

Bobby said:   7 years ago
It is Because of intermolecular bonding.

Bibek gahatraj said:   8 years ago
Lamp back is softer than graphite. So answer is option D.

S.vasathi said:   8 years ago
Diamond is the hardest element in the world.

Pavithran of sri gurukulam hosur said:   9 years ago
The molecular structure is different. Carbon atoms in graphite are bonded in layers with only weak covalent bonds holding the layers together. When you write with a pencil some of the layers detach from the pencil lead and attach to the paper. Carbon atoms in diamond are bonded in a stronger tetrahedron pattern.

Nea said:   9 years ago
How the graphite is softest?

Srikant said:   1 decade ago
Diamond and graphite have different molecular structure.

Viru said:   9 years ago
What is meant by allotropes of carbon?

G.Prasanna kumar said:   9 years ago
Graphite is soften in nature because of its structure i.e. layers present in the graphite makes the graphite soften.

Muchiram tudu said:   1 decade ago
I think diamond is the hardest and lamp black is soften.


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