Polymers
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3 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i) → (d) (ii) → (e) (iii) → (a) (iv) → (f) (v) → (b) (vi) → (c)
New answer posted
3 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i) → (b) (ii) → (c) (iii) → (a) (iv) → (e) (v) → (d)
New answer posted
3 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i) → (c) (ii) → (a) (iii) → (b) (iv) → (e) (v) → (d)
New answer posted
3 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i) → (e) (ii) → (c) (iii) → (a) (iv) → (b) (v) → (d)
New answer posted
3 months agoContributor-Level 10
This is a short answer type question as classified in NCERT Exemplar
Monomers used in addition to polymerization through free radical pathway should be very pure because even the traces of impurities acts like inhibitors. It leads to the formation of polymers with a shorter chain lengths.
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3 months agoContributor-Level 10
This is a short answer type question as classified in NCERT Exemplar
Proteins have some similar structural similarities with synthetic polyamides. Proteins and polyamides both contain amide linkage.
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3 months agoContributor-Level 10
This is a short answer type question as classified in NCERT Exemplar
Urea-formaldehyde resin is used in laminated sheets. The monomer involved in the formation of urea formaldehyde resin is urea and formaldehyde.
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3 months agoContributor-Level 10
This is a short answer type question as classified in NCERT Exemplar
Polymers that possess amide linkage are termed as nylon. Fibers have a strong intermolecular force of attraction like hydrogen bonding. It leads to the close packing of the structure which imparts the crystalline nature.
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3 months agoContributor-Level 10
This is a short answer type question as classified in NCERT Exemplar
Free radicals are generated from benzoyl peroxide. Alkanes, dienes are polymerized in the presence of free radical inhibitors like benzoyl peroxide, acetyl peroxide. For example, benzoyl peroxide inhibitor is used for the polymerization of ethene to polythene. First, phenyl peroxide radicals are formed which are added to the double bond of ethene generating a new and larger free radical.
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3 months agoContributor-Level 10
This is a short answer type question as classified in NCERT Exemplar
LDP: The polymerization of ethene under high pressure and temperature in the presence of peroxide catalyst gives low-density polythene. It is obtained through free radical addition and has a high branched structure. It is chemically inert and is a poor conductor of electricity. It is used for manufacturing toys, bottles.
HDP: When addition polymerization of ethene takes place in a hydrocarbon solvent in the presence of a catalyst such as triethylaluminium and Ziegler-Natta catalyst at high temperature and pressure then high-density polythene is formed. It consists of li
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