General Knowledge - General Science - Discussion

4. 

Which of the following is used in pencils?

[A]. Graphite
[B]. Silicon
[C]. Charcoal
[D]. Phosphorous

Answer: Option A

Explanation:

No answer description available for this question.

Akash Patel said: (Dec 14, 2010)  
As pencil is slippery in touch and the graphite is also slippery in touch. Also pencil is black in color as graphite is.

Yashasvi said: (May 30, 2011)  
People beleive that mankind in stone age used agraphite stone to write on mud so scientist even tried to do same so pencils were created.

Shanti Lal Sharma said: (Jun 14, 2011)  
Graphite is used in pencil

Patel Dhaval A said: (Jun 28, 2011)  
Graphite is very soft to easy sharp and very easy write on paper and its smothly removable.

Aarthi said: (Aug 13, 2011)  
GRAPHITE is black colour and it is soft and sharp. It is one of carbon. So pencil writes black.

Tin said: (Aug 29, 2011)  
Of couse graphite is used in making pencil leads but you know that graphite is a soft non metal and gets powdered easily in hand. So in order to make it hard its mixed with a substance. I don't exactly know the substance's name. If any one knows it please post it here as graphite is lustrous so to be used!

Khushbu Machiwal said: (Sep 15, 2011)  
Because graphite is soft & smooth like a pencile.

Khushbu Machiwal said: (Sep 15, 2011)  
Because graphite is soft & smooth like a pencile.

Sonam Singh said: (Sep 24, 2011)  
Nib of the pencil is of graphite the main part of the pencil by which we write it's a soft non metal and easily removable as well.

Aboothar said: (Oct 16, 2011)  
Graphit is a non metal.

It is a good conductor.

If a pencil point touch the electirc current.

It we give a spark & chocking smell.

Rameshori said: (Nov 3, 2011)  
Graphite is soft & smooth it is non matel.

Sivachandran said: (Jan 10, 2012)  
Ya graphite is good conductor as well as it is used in pencil.

Pankaj Sharma said: (Jan 13, 2012)  
Graphite and diamond are the allotropes of carbon. Allotropes are those elements which have same atomic no but different masss number.

S.V. Prasad said: (Feb 6, 2012)  
Yes pencil made from Graphite. Many thought that it was made by led. Because we called it as pencil lead.

Yadu said: (Apr 4, 2012)  
Why charcol, silicon are not used?

Sujit said: (May 3, 2012)  
It's also included carbon element.

Panda said: (May 14, 2012)  
graphite is not insulator

Neelam Saxena said: (May 17, 2012)  
Yes graphite is used in pencil.

Vinanthi said: (May 29, 2012)  
Graphite is mixed with clay powder to make it hard. Only colour pencils contains lead not normal.

Parish Mishra said: (Jul 15, 2012)  
Graphite structure is hexagonal and it is build in layer which can slip in surface so it is used for pencil.

Rupace Shah said: (Aug 27, 2012)  
Its a non metal but good conductor of electricity and it is made of triple bond and three dimensonal.

Ashish said: (Aug 31, 2012)  
Aside from being the material in your lead pencils, graphite is of tremendous value as an industrial material. It is used to make the brushes for electric motors and generators, and it has wide use as an electrode in a number of applications, primarily batteries.

Graphite has been, is, and will continue to be critically important to maintaining and advancing modern civilization. And this because it is in things we use every day, and because it is used in industrial processes that provide the foundation we build our society on.

Priya said: (Dec 10, 2012)  
If pencil writes black due to graphite then which element is used in color pencils.

Muhammad Azam said: (Jan 18, 2013)  
Lead is used because it is soft and easy to sharp.

Jay Jay said: (Feb 5, 2013)  
graphite and pencil is having same features.

Arun Singh said: (Feb 22, 2013)  
Its a derivative of diamond and used in pencil and very soft.

Mohan said: (Mar 19, 2013)  
Its a carbon compound and the graphite is very soft that's why it will easily broken.

Akila said: (Mar 25, 2013)  
The central lead of pencil is made of graphite which is black, soft and hence makes markable impressions on the paper.

V.S.Shabarish said: (May 12, 2013)  
As we all know carbon is a black element and the graphite is the softest allotropes of carbon. If you try. To break a pencil you will find the middle black part (graphite).

Easily breaks it makes impression on light surface it imparts carbon to the surface of paper therefore graphite is used in pencil.

Neha said: (Jun 13, 2013)  
Graphite is the allotropes of carbon. It is black and soft.

Gaurav Wankhade said: (Sep 1, 2013)  
Pencil manufacturing. The top sequence shows the old method that required pieces of graphite to be cut to size; the lower sequence is the new, current method using rods of graphite and clay.

Jaspal Dudi said: (Oct 6, 2013)  
We write by the pencil on paper then pencil slide on paper than we write any sentence. It mains we need a sliding metal. Graphite is a sliding metal. So graphite is use in pencil.

Chith said: (Oct 31, 2013)  
Graphite slides easily on any surface and has a loose carbon structure, so as for it being used in pencils, pencil lead has to be smooth and slide across the paper to write properly. Also, graphite is naturally a very dark grey, almost black colour. The same as pencil lead. Note: Just because we call pencil lead 'lead', it does not literally mean that it is made of lead; that's impossible.

Muhammad Bello said: (Nov 17, 2013)  
Soft graphite is use to make pencil lead.

Srinivas said: (Nov 30, 2013)  
Graphite is the allotropes of carbon. It is black and soft.

M.Mouna said: (Jan 25, 2014)  
Graphite is slippery in nature and also pencil impurities also slippery in nature, so we are using this graphite in pencil.

Rajendra Kushawah said: (Jan 31, 2014)  
Graphite is soft material, it is easily Sharp, graphite is semiconductor.

Choeyangtsomo said: (Feb 2, 2014)  
Graphite is semiconductor.

Ramkrishna said: (Feb 2, 2014)  
In old days our ancestors used a type of stone (graphite) to write with and by the help of it they could write anywhere easily. In nowadays it is modalised in the pencil.

Vaishnavi said: (Mar 16, 2014)  
Graphite is non metal and brittle which breaks easily so it is used in pencils.

Ashutosh Maurya said: (Mar 21, 2014)  
As graphite is a hard and non-metal, brittle also allotropes of carbon, and it is black and soft.

Ashutosh Maurya said: (Mar 21, 2014)  
Graphite because it is allotropes of carbon, black and soft and NON-METAL and both have same features and slippery in nature so this way GRAPHITE is use for making pencil.

Mayank Sharma said: (Mar 27, 2014)  
As graphite is a hard and non-metal, brittle also allotropes of carbon, and it is black and soft.

Ramanpreet Dhanesar said: (May 10, 2014)  
Graphite is a metal. It is black in colour and very smooth for use. So it is use in pencils.

Vinay Kumar Baithi said: (Jun 3, 2014)  
Because graphite is carbon it has in black color it can easily wrote in paper.

Shivangi said: (Jun 7, 2014)  
graphite is a soft &sharp so it is use in pencil.

Ashish K Purty said: (Jun 23, 2014)  
Graphite is used in pencil because it is softness, smoothness and removable.

Prashanth said: (Jul 26, 2014)  
Yes. Graphite is a form of carbon. It forms a network covalent solid, which causes layers of C atoms on top of each other. This allows the layers of carbon to slip over each other and gives pencils the ability to write. Hence graphite is used in pencils.

Kamalesh said: (Jul 31, 2014)  
The graphite is an allotropic form of carbon that consists of atoms of carbon that possesses a kind of hybridization in a way that three strong bonds are forming a equilateral triangle in the same plane and a weaker bond perpendicular to that plane.

This allows that carbon arranged in parallel "sheets" that slide one each other giving the graphite a high lubricant performance.

That is the reason that is used in lead pencils: each graphite sheet slides on the paper surface when we write on it, leaving carbon atoms adhered on it. We saw the result as writing characters.

Govind said: (Aug 8, 2014)  
Early lead were used. Now Graphite is being used.

Rajesh Kumar Das said: (Aug 22, 2014)  
Graphite is a soft non-metals and gets powdered easily in hand. So graphite use in pencils.

Moin said: (Aug 31, 2014)  
Graphite is soft in nature that's why it is use for making pencils.

Vishal said: (Sep 19, 2014)  
Graphite is a soft black colour non metal which we can write easily on the graph paper or any surface of the things.

Chomi said: (Sep 28, 2014)  
Which is the mixture present in the pencil lead?

Rahija said: (Oct 6, 2014)  
Hello @Tin and @Chomi, Graphite mixed with clay to make a pencil lead.

Lokesh Singh said: (Dec 17, 2014)  
Then why it is called "Lead Pencil"?

Sai Dharani said: (Dec 21, 2014)  
Why only Graphite is only used in pencils?

Ekhan said: (Jan 1, 2015)  
Graphite can easily eraser from eraser.

Rohitranjan said: (Feb 16, 2015)  
Graphite is hard rocking.

Snehal Munde said: (Mar 18, 2015)  
Graphite is form of carbon.

Durgaprasad Dsp said: (Apr 2, 2015)  
Graphite is one of the allotrope of carbon and it is Black in color.

And one doubt. What is the difference between Graphite and Lead pencil?

Durgaprasad said: (Apr 2, 2015)  
What is compound present in eraser?

Chingkhei said: (May 5, 2015)  
Pencils present graphite on the middle round of it. Graphite can easily mark on the paper cause graphite is the one element to make a pencil.

Punam Jyoti Lenka. said: (Jun 6, 2015)  
Graphite can easily mark on the paper. So, a pencil make in graphite.

Punam Jyoti said: (Jun 6, 2015)  
Graphite's colour is black. Paper colour is white and graphite can mark on the paper easily. So, graphite is the one element to make a pencil.

Ramesh said: (Jun 10, 2015)  
Which used in a color pencil also graphite or any other non metal?

Ramesh said: (Jun 10, 2015)  
Most pencil marked a graphite mixed a clay and a leaves grey and black mark easily eraser.

Abdul_Muhsin said: (Jun 20, 2015)  
As pencil is slippery in touch and the graphite is also slippery in touch. Also pencil is black in color as graphite is. People believe that mankind in stone age used a graphite stone to write on mud so scientist even tried to do same so pencils were created.

Graphite is very soft to easy sharp and very easy write on paper and its smoothly removable. Graphite is a non metal.

It is a good conductor. If a pencil point touch the electric current. It we give a spark & chocking smell.

Aman said: (Aug 6, 2015)  
Graphite is metal or non metal.

Neha Raut said: (Aug 16, 2015)  
Graphite is a crystalline form of carbon which is use to make pencil lead.

Piyush Meena said: (Aug 16, 2015)  
Graphite is soft and sharp.

Vedha said: (Aug 22, 2015)  
Pencil's lead is soft and sharp. It is also black in color as graphite.

Prince Neta said: (Sep 13, 2015)  
Graphite is a soft non metal. It is used in pencil.

Ng Wei Chuen said: (Oct 8, 2015)  
Why is graphite used in pencils?

Can't something else be used instead such as processed leaf?

Rajesh said: (Oct 8, 2015)  
Graphite is very soft and easily sharp.

Billu said: (Oct 22, 2015)  
Because graphite is is a non porous metal.

Hamza Saleem said: (Nov 4, 2015)  
Because the pencil have to leave a grey mark on the page that's why the graphite used in the pencil.

Krishna said: (Dec 9, 2015)  
Graphite is good.

Reethu said: (Dec 20, 2015)  
Graphite is the most stable form of carbon.

Brajesh Shakya said: (Dec 26, 2015)  
Graphite is softonic substance because use the pancle.

Daniel Wundengba said: (Jan 1, 2016)  
Pencil has a black color as well as graphite. So that is truly the answer.

Guru said: (Feb 6, 2016)  
Because of soft graphite such as 8b.

Purva said: (Feb 13, 2016)  
Graphite is the answer.

Rupesh said: (Feb 18, 2016)  
What is the atomic number of graphite?

Sudev S Sunish said: (Feb 23, 2016)  
Graphite is softest form of carbon and is used in lubrication.

Bali said: (Mar 26, 2016)  
Graphite is the correct answer.

Lily said: (Mar 29, 2016)  
Graphite is another giant covalent structure made of carbon atoms. In graphite, each carbon atom is joined to three others, forming layers:.

Diagram showing graphite structure.

The bonds between the layers are much weaker than covalent bonds. This enables the layers to slide over each other, making graphite soft. Graphite can also conduct electricity, between the layers of carbon atoms.

Graphite is used as pencil 'lead'. As the pencil moves across the paper, layers of graphite rub off.

Nive... said: (Apr 16, 2016)  
Hi, @Tin. Your explanation is correct. I think so that the substance is clay powder.

Dane said: (May 10, 2016)  
I agree with you @Lily.

The graphite has van der Waals forces between its layers and this makes it soft when writing.

Ramakrishnan said: (Aug 18, 2016)  
Also, graphite is non-reactive to skin and paper.

Ramakrishnan said: (Aug 18, 2016)  
Also, graphite is non-reactive to skin and paper.

Brianna said: (Oct 5, 2016)  
Well, technically, a pencil has the lead and it uses something to compress it to write the information needed. BTW's, in history, Egypt used a stylus to write. But, as my inference, I say it came from there to us. In some way shape and form they let us use their technique and we, the people, took it from there.

Aamna said: (Oct 20, 2016)  
Well, graphite is correct because of the pencil as the lead in it.

Th.Rakesh said: (Nov 11, 2016)  
Pencil is black color and graphite as found in stone.

Ankur said: (Jan 8, 2017)  
Graphite is a type of carbon means it is obtained from dead remains.

Duncan said: (Jan 14, 2017)  
Graphites obtained from Dead remain or fossils. Graphites can be used in batteries.

Rajesh said: (Jan 17, 2017)  
Graphite is the correct answer.

Rahul said: (Jan 30, 2017)  
Yes, Graphite is the Right answer.

Sammi said: (Mar 23, 2017)  
Yes, graphite is the right answer because it allows all the carbon particles to arrange themselves in such a way that they form a parallel line to each other and allow the graphite to work smoothly like a lubricate. And also before they were using lead which was very poisonous and dangerous then they started using this graphite instead of the lead in the pencil "which is smooth, dark or black in colour.

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