Multiple Choice QuestionsWhich is correct example of condensation polymer?
Nylon, Buna-S
Teflon, Buna-N
Nylon 6,6, Dacron
Neoprene, Buna-S
C.
Nylon 6,6, Dacron
Nylon 6, 6 and dacron are the examples of condensation polymers. Condensation polymers are formed by condensation of two or more bifunctional monomers with the elimination of simple molecules like H2O, NH3, alcohol, etc. Dacron is formed from ethylene glycol and terephthalic acid with the removal of H-O. Nylon 6, 6 is formed from hexamethylenediamine and adipic acid with the removal of HO.
Non-stick cookwares generally have a coating of a polymer, whose monomer is
CH2 = CH2
CH2 = CHCN
CH2 = CHCl
CF2 = CF2
The formula of nylon is :
-[OC(CH2)6-CONH-(CH2)4-NH]n-
-[OC(CH2)4-CONH-(CH2)6-NH]n-
-[OC(CH2)3-CONH-(CH2)6-NH]n-
[OC-(CH2)2-CONH-(CH2)6-NH]n-
Isoprene is
3-methyl-1,2-butadiene
2-methyl-1,3-butadiene
3-chloro-1,2-butadiene
2-chloro-1,3-butadiene.
Assertion : Ebonite is highly vulcanised rubber.
Reason : Perlon is used in the manufacture of fibres.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion : Teflon has high thennal stability and chemical inertness.
Reason : Teflon is a thermoplastic.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
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