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 1 of 4.

Srinivas said:   7 months ago
Yes, You are right @ Deepak.

Lampblack does not have a well-defined crystalline structure; it consists of amorphous carbon particles.
Lampblack is not considered an allotrope of carbon, it is a form of carbon black produced by incomplete combustion.

So, option C is the right answer.
(1)

Edf said:   1 year ago
Graphite is softer than lamp black.

Aniij said:   2 years ago
Diamond is made of graphite, Lamp black is made up of the lamp.
It's obvious that lampblack is softer than graphite.
Hope it helps.

Deepak said:   2 years ago
Lamp black is amorphous so it has no structure.

Barsha said:   3 years ago
As per my knowledge, Lampblack should be the softest one. How is graphite is the softest here? Somebody explain, please.

Ravikumar Gowda said:   4 years ago
The right one is Diamond hardest but softest is lamp black.

Saptarshi Khandait said:   5 years ago
Diamond is hardest and Lamp black is softest.

Beny said:   6 years ago
Which means coke?

Cheenu said:   6 years ago
Lamp black is the softest.

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.


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