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.

Harihara sudhan said:   1 decade ago
Diamond has a rigid structure due to strong covalent bond.

Graphite has a weak structure due to weak Vander waal's force.

Gaurav said:   1 decade ago
Diamond is have crystalline form due to covalent bond that's why it is hard in nature.

Puja said:   1 decade ago
I think lamp black is softest not graphite.

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

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.

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

Jasna said:   9 years ago
Graphite is weak due to Vanderwall force.

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

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.

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


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