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CBSE Class 12-science Answered

HOw to make biodegradable plastic using human hair?
Asked by anmol sahni | 06 Dec, 2012, 10:16: PM
answered-by-expert Expert Answer
bioplastics can be prepared by treating human tresses with glycerine and sodium sulphite and heating  till they melt forming a substance resembling leather which is biodegradable.
Answered by | 08 Feb, 2013, 03:27: PM

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CBSE 12-science - Chemistry
A polymer sample contains 30%(by weight) of chains with molecular weight 10000, 30%(by weight) of the chains with molecular weight 20000, and the rest of chains with molecular weight 30000. Calculate the number average and weight average molecular weight of the sample.
Asked by me.shekharhimanshu | 19 Jun, 2020, 12:03: PM
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CBSE 12-science - Chemistry
For viva..pl as soon as possible 
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Asked by jain.pradeep | 19 Jan, 2020, 11:06: PM
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CBSE 12-science - Chemistry
give differnent uses of bakelite and PHBV
Asked by yashwant.mcr3004 | 10 Oct, 2019, 12:31: PM
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CBSE 12-science - Chemistry
In a polymer sample 30% of molecules have a molecular mass 20,000, 40% have 30,000 and the rest 60,000. What is the weight average molecular mass of the polymer? (1) 40,300, (2) 30,600, (3) 43,333, (4) 50,400
Asked by patra04011965 | 14 May, 2019, 07:55: AM
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CBSE 12-science - Chemistry
Write the structures of monomers used to obtain the following polymers: (a) Natural rubber (b) PVC (c) Nylon-6,6
Asked by sanjeet.kumar | 12 Mar, 2019, 02:18: PM
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CBSE 12-science - Chemistry
How are polymers classified on the basis of synthesis?
Asked by Topperlearning User | 22 Jun, 2016, 12:37: PM
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CBSE 12-science - Chemistry
Monomers combine with the loss of a simple molecule in the case of which polymerization reaction?
Asked by Topperlearning User | 22 Jun, 2016, 12:34: PM
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CBSE 12-science - Chemistry
What happens when 'n' number of ethylene molecules are added up?
Asked by Topperlearning User | 17 Oct, 2014, 09:40: AM
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CBSE 12-science - Chemistry
How natural polymers differ from synthetic polymer?
Asked by Topperlearning User | 17 Oct, 2014, 09:40: AM
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CBSE 12-science - Chemistry
What is natural rubber?
Asked by Topperlearning User | 23 Jun, 2014, 04:35: PM
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