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Statement 1 : The order of extent of attractive forces between monomers is fibres > thermoplastic polymers > elastomers
Statement II : Thermoplastic polymers become soft on heating
Statement III : Thermosetting polymers become hard on heating
correct statement is /are

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All

Only II

Only I, III

Only I

answer is A.

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Detailed Solution

(I) Fibres . . . H-bonding ; elastomers . . . vanderwals forces thermoplastics have intermolecular attractions stronger than in elastomers but weaker than in fibers.

(II) Thermoplastics become soft on heating and hard on cooling. This process can be repleated any number of times,

(III) Thermo setting polymers heating mold into a particuler shape due to extensive crosslining. The cannot be made soft (or) posible on cooling.

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