General Knowledge - General Science - Discussion
Discussion Forum : General Science - Elements and Metals (Q.No. 23)
23.
Among the various allotropes of carbon,
Discussion:
32 comments Page 1 of 4.
Pavithran of sri gurukulam hosur said:
8 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.
Shoaib said:
1 decade ago
Dear vinesh,
Diamond has strong covalent bonds (c-bond) but graphite has very weak c-bond & double layer of graphite with weak c-bond make it weakest from others.
Eg: Pencil led, if you crush it it can easily crushed where as if you want to crush diamond you can't crush it easily.
Diamond has strong covalent bonds (c-bond) but graphite has very weak c-bond & double layer of graphite with weak c-bond make it weakest from others.
Eg: Pencil led, if you crush it it can easily crushed where as if you want to crush diamond you can't crush it easily.
Srinivas said:
8 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.
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)
Anil kandel said:
1 decade ago
Pencil led, if you crush it it can easily crushed where as if you want to crush diamond you can't crush it easily. So we can say diamond is hardest in comparison to graphite.
Arfath said:
1 decade ago
Ya diamond is hardest because it has covalent bonds whereas graphite is just good conductor of electricity also diamond and graphite have different structures.
Sam singh said:
1 decade ago
DIAMOND IS THE AS HARDEST as all valency of its C compound are attached to next four carbons where as graphite having 1 free electron making it softest.
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.
It's obvious that lampblack is softer than graphite.
Hope it helps.
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.
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.
Graphite has a weak structure due to weak Vander waal's force.
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.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers