QBManager

POLYMERS

19448 When heated with zinc chloride, lactides forms a linear polymer which may be

1 Polystyrene

2 Polyamide

3 Polyester

4 Polythene

Explanation:

Lactide can be polymerized to polylactic acid (polylactide) which is a thermoplastic polyester with backbone formula ${(C_{3} H_{4} O_{2})}_{n}$ formally obtained by condensation of lactic acid in presence of various metal catalysts $(Z n C l_{2})$ with loss of water.

POLYMERS

19449 Which of the following has been used in the manufacture of non-inflammable photographic films

1 Cellulose nitrate

2 Cellulose acetate

3 Cellulose xanthate

4 Cellulose perchlorate

POLYMERS

19450 The phenol-formaldehyde resins are formed by polymerisation of phenol and formaldehyde by

1 Addition polymerisation

2 Condensation polymerisation

3 Both

(a)

and

(b)

4 None of these

POLYMERS

19451 $P V C$ is obtained by polymerization of

1

C H_{2} = C H - C H_{2} - C l

2

C H_{2} = C H - C l

3

C H_{3} - C l

4

C H_{3} - C H C l_{2}

Explanation:

(b) $\underset{Vinylchloride}{n (C H_{2} = C H - C l}) \to \underset{(P V C)}{{- (C H_{2} - \underset{C l}{\underset{|}{C H}} -)}_{n}}$

POLYMERS

19452 The monomers used in the production of nylon - $66$ are

1 Hexamethylene diamine and ethylene glycol

2 Adipic acid and ethylene glycol

3 Adipic acid and hexamethylene diamine

4 Dimethyl terephthalate and ethylene glycol

Explanation:

(c) Adipic acid $(H O O C - (C H_{2})_{4} - C O O H)$ and Hexamethylene diamine $(N H_{2} - (C H_{2})_{6} - N H_{2})$

POLYMERS

19448 When heated with zinc chloride, lactides forms a linear polymer which may be

1 Polystyrene

2 Polyamide

3 Polyester

4 Polythene

Explanation:

Lactide can be polymerized to polylactic acid (polylactide) which is a thermoplastic polyester with backbone formula ${(C_{3} H_{4} O_{2})}_{n}$ formally obtained by condensation of lactic acid in presence of various metal catalysts $(Z n C l_{2})$ with loss of water.

POLYMERS

19449 Which of the following has been used in the manufacture of non-inflammable photographic films

1 Cellulose nitrate

2 Cellulose acetate

3 Cellulose xanthate

4 Cellulose perchlorate

POLYMERS

19450 The phenol-formaldehyde resins are formed by polymerisation of phenol and formaldehyde by

1 Addition polymerisation

2 Condensation polymerisation

3 Both

(a)

and

(b)

4 None of these

POLYMERS

19451 $P V C$ is obtained by polymerization of

1

C H_{2} = C H - C H_{2} - C l

2

C H_{2} = C H - C l

3

C H_{3} - C l

4

C H_{3} - C H C l_{2}

Explanation:

(b) $\underset{Vinylchloride}{n (C H_{2} = C H - C l}) \to \underset{(P V C)}{{- (C H_{2} - \underset{C l}{\underset{|}{C H}} -)}_{n}}$

POLYMERS

19452 The monomers used in the production of nylon - $66$ are

1 Hexamethylene diamine and ethylene glycol

2 Adipic acid and ethylene glycol

3 Adipic acid and hexamethylene diamine

4 Dimethyl terephthalate and ethylene glycol

Explanation:

(c) Adipic acid $(H O O C - (C H_{2})_{4} - C O O H)$ and Hexamethylene diamine $(N H_{2} - (C H_{2})_{6} - N H_{2})$

POLYMERS

19448 When heated with zinc chloride, lactides forms a linear polymer which may be

1 Polystyrene

2 Polyamide

3 Polyester

4 Polythene

Explanation:

Lactide can be polymerized to polylactic acid (polylactide) which is a thermoplastic polyester with backbone formula ${(C_{3} H_{4} O_{2})}_{n}$ formally obtained by condensation of lactic acid in presence of various metal catalysts $(Z n C l_{2})$ with loss of water.

POLYMERS

19449 Which of the following has been used in the manufacture of non-inflammable photographic films

1 Cellulose nitrate

2 Cellulose acetate

3 Cellulose xanthate

4 Cellulose perchlorate

POLYMERS

19450 The phenol-formaldehyde resins are formed by polymerisation of phenol and formaldehyde by

1 Addition polymerisation

2 Condensation polymerisation

3 Both

(a)

and

(b)

4 None of these

POLYMERS

19451 $P V C$ is obtained by polymerization of

1

C H_{2} = C H - C H_{2} - C l

2

C H_{2} = C H - C l

3

C H_{3} - C l

4

C H_{3} - C H C l_{2}

Explanation:

(b) $\underset{Vinylchloride}{n (C H_{2} = C H - C l}) \to \underset{(P V C)}{{- (C H_{2} - \underset{C l}{\underset{|}{C H}} -)}_{n}}$

POLYMERS

19452 The monomers used in the production of nylon - $66$ are

1 Hexamethylene diamine and ethylene glycol

2 Adipic acid and ethylene glycol

3 Adipic acid and hexamethylene diamine

4 Dimethyl terephthalate and ethylene glycol

Explanation:

(c) Adipic acid $(H O O C - (C H_{2})_{4} - C O O H)$ and Hexamethylene diamine $(N H_{2} - (C H_{2})_{6} - N H_{2})$

POLYMERS

19448 When heated with zinc chloride, lactides forms a linear polymer which may be

1 Polystyrene

2 Polyamide

3 Polyester

4 Polythene

Explanation:

Lactide can be polymerized to polylactic acid (polylactide) which is a thermoplastic polyester with backbone formula ${(C_{3} H_{4} O_{2})}_{n}$ formally obtained by condensation of lactic acid in presence of various metal catalysts $(Z n C l_{2})$ with loss of water.

POLYMERS

19449 Which of the following has been used in the manufacture of non-inflammable photographic films

1 Cellulose nitrate

2 Cellulose acetate

3 Cellulose xanthate

4 Cellulose perchlorate

POLYMERS

19450 The phenol-formaldehyde resins are formed by polymerisation of phenol and formaldehyde by

1 Addition polymerisation

2 Condensation polymerisation

3 Both

(a)

and

(b)

4 None of these

POLYMERS

19451 $P V C$ is obtained by polymerization of

1

C H_{2} = C H - C H_{2} - C l

2

C H_{2} = C H - C l

3

C H_{3} - C l

4

C H_{3} - C H C l_{2}

Explanation:

(b) $\underset{Vinylchloride}{n (C H_{2} = C H - C l}) \to \underset{(P V C)}{{- (C H_{2} - \underset{C l}{\underset{|}{C H}} -)}_{n}}$

POLYMERS

19452 The monomers used in the production of nylon - $66$ are

1 Hexamethylene diamine and ethylene glycol

2 Adipic acid and ethylene glycol

3 Adipic acid and hexamethylene diamine

4 Dimethyl terephthalate and ethylene glycol

Explanation:

(c) Adipic acid $(H O O C - (C H_{2})_{4} - C O O H)$ and Hexamethylene diamine $(N H_{2} - (C H_{2})_{6} - N H_{2})$

POLYMERS

19448 When heated with zinc chloride, lactides forms a linear polymer which may be

1 Polystyrene

2 Polyamide

3 Polyester

4 Polythene

Explanation:

Lactide can be polymerized to polylactic acid (polylactide) which is a thermoplastic polyester with backbone formula ${(C_{3} H_{4} O_{2})}_{n}$ formally obtained by condensation of lactic acid in presence of various metal catalysts $(Z n C l_{2})$ with loss of water.

POLYMERS

19449 Which of the following has been used in the manufacture of non-inflammable photographic films

1 Cellulose nitrate

2 Cellulose acetate

3 Cellulose xanthate

4 Cellulose perchlorate

POLYMERS

19450 The phenol-formaldehyde resins are formed by polymerisation of phenol and formaldehyde by

1 Addition polymerisation

2 Condensation polymerisation

3 Both

(a)

and

(b)

4 None of these

POLYMERS

19451 $P V C$ is obtained by polymerization of

1

C H_{2} = C H - C H_{2} - C l

2

C H_{2} = C H - C l

3

C H_{3} - C l

4

C H_{3} - C H C l_{2}

Explanation:

(b) $\underset{Vinylchloride}{n (C H_{2} = C H - C l}) \to \underset{(P V C)}{{- (C H_{2} - \underset{C l}{\underset{|}{C H}} -)}_{n}}$

POLYMERS

19452 The monomers used in the production of nylon - $66$ are

1 Hexamethylene diamine and ethylene glycol

2 Adipic acid and ethylene glycol

3 Adipic acid and hexamethylene diamine

4 Dimethyl terephthalate and ethylene glycol

Explanation:

(c) Adipic acid $(H O O C - (C H_{2})_{4} - C O O H)$ and Hexamethylene diamine $(N H_{2} - (C H_{2})_{6} - N H_{2})$