Chemistry

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(i) → (d) (ii) → (a) (iii) → (b)

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(i) → (d) (ii) → (e) (iii) → (a) (iv) → (f) (v) → (b) (vi) → (c)

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(i) → (b) (ii) → (c) (iii) → (a) (iv) → (e) (v) → (d)

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(i) → (c) (ii) → (a) (iii) → (b) (iv) → (e) (v) → (d)

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(i) → (e) (ii) → (c) (iii) → (a) (iv) → (b) (v) → (d)

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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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Proteins have some similar structural similarities with synthetic polyamides. Proteins and polyamides both contain amide linkage.

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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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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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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.