CBSE 12th Standard Chemistry Subject Polymers Ncert Exemplar 2 Mark Questions 2021
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CBSE 12th Standard Chemistry Subject Polymers Ncert Exemplar 2 Mark Questions 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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What is the role of benzoyl peroxide in addition polymerisation of alkenes ?
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A natural linear polymer of 2-methyl-1,3-butadiene becomes hard on treatment with sulphur between 373 to 415K and -S-S- bonds are formed between chains.Write the structure of the product of this treatment?
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Out of chain growth polymerisation and step growth polymerisation, in which type will you place the following:
(A)m +(A)m(A)n or(A)m+n -
Why are rubbers called a elastomer?
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can enzyme be called a polymer?
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CBSE 12th Standard Chemistry Subject Polymers Ncert Exemplar 2 Mark Questions 2021 Answer Keys
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It acts as initator in free radical polymerisation
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The natural linear polymer of 2-methyl-l, 3-butadiene is cis-polyisoprene (natural. rubber). On heating with sulphur between 373·415 K, vulcanization occurs as a result of which --S--S- bridges or cross-links are introduced between polymer chains through their reactive allylic positions as shown below:
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Rubbers get stretched on application of force and regain original state after the force is withdrawn. Therefore, these are called elastomers.
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Enzymes are biocatalysts which being proteins are n regarded as polymers
