What are the monomers of dacron?

The monomers of dacron are

A

Decane and decanol

B

Decanone and decanol

C

Ethylene glycol and terephthalic acid

D

Ethylene glygol and phthalic acid

Calculate the number average molecular mass of a polymer having four different monomers A, B, C and D present in equal number. The molecular masses of the monomers are 10000, 15000, 30000 and 50000 respectively.

A

10050

B

17350

C

26250

D

35475

These two monomers have similar structures, but with a slight difference of sulphur atom replaced by a nitrogen atom bonded to hydrogen. Which pair represents these monomers?

A

Thiophene and Pyrrole

B

Thiophene and Pyridine

C

Pyrrole and Imidazole

D

Piperidine and Pyrrole

How many molecules of hydrochloric acid are released when n monomers of di-acid chloride and n monomers of di-alcohol are reacted to form a polymer?

A

2n

B

n-1

C

2n-1

D

n

Consider the following statements for condensation polymerization- I. Bifunctional or polyfunctional monomers II. Loss of each kind of functional group in each step for bifunctional species III. Always accompanied by the release of a byproduct molecule IV. Monofunctional or polyfunctional monomers Which of the following are true?

A

I and II

B

I, II and III

C

I and III

D

III and IV

80 moles of monomers react to prepare Nylon 12. After completion of 8 hrs, 4 moles of monomers are still left. What is the weight average molecular weight of polymer system?

A

1263

B

197

C

3940

D

7683

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: IgM is found in serum as a pentameric protein consisting of five IgM monomers.
Reason: The pentameric form of IgM is due to cross linking of IgM monomers via peptide bond.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true but (R) is not the correct reason for (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Dacron (or terylene) fibres as compared to nylon fibres have

A

Better heat & acid resistant properties

B

Poorer resistance to alkalis

C

Poorer dyeability

D

All of the above

Dacron (or terylene) fibres as compared to nylon's fibres have

A

Better heat & acid resistant properties

B

Poorer resistance to alkalis

C

Poorer dyeability

D

All of the above

Dacron is a

A

Condensation polymerisation product of hexamethylene diamine and adipic acid

B

Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol

C

Thermosetting material

D

None of these

What are the monomers of dacron?

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