Rubber

Q.

Which is the monomer of neoprene in the following ?

1. 

2. 

3. 

4. 

Q. Natural rubber is

1. An addition polymer of neoprene
2. A condensation polymer of neoprene
3. An addition polymer of isoprene
4. An addition polymer of chloroprene

Q.

Which of the following statement is correct regarding the drawbacks of raw rubber [AIIMS 2001]

1. It is plastic in nature

2. It has little durability

3. It has large water-absorption capacity

4. All of these

Q.

Structure of some important polymers is given. Which one represents Buna-S?

1. $(-C{H}_2-\stackrel{\stackrel{C{H}_3}{|}}{C}=CH-C{H}_2-{)}_n$

2. $(-C{H}_2-CH=CH-C{H}_2-\underset{\underset{C_6{H}_5}{|}}{CH}-C{H}_2-{)}_n$

3. $(-C{H}_2-CH=CH-CH-C{H}_2-\underset{\underset{CN}{|}}{CH}-C{H}_2-{)}_n$

4. $(-C{H}_2-\stackrel{\stackrel{Cl}{|}}{C}=CH-C{H}_2-{)}_n$

Q.

Assertion: Teflon has high thermal stability and chemical inertness.
Reason: Teflon is a thermoplastic.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.

2. If both assertion and reason are true but reason is not the correct explanation of the assertion.

3. If the assertion and reason both are false.

4. If assertion is false but reason is true.

Q. Match list I with list II and select the correct answer using the codes given below the lists.

List I (Polymer)	List II (Polymerizing units)
$A.Bakelite$	(i) Butadiene and styrene
$B.Dacron$	(ii) Phenol and methanal
$C.Nylon-6,6$	(iii) 1, 2-dihydroxyethane and dimethylterephthalate
$D.Buna-S$	(iv) Urea and methanol
	(v) 1, 6-hexanedioic acid and 1, 6-dimino hexane

1. A-(iv), B-(iii), C-(v), D-(i)
2. A-(ii), B-(iii), C-(v), D-(i)
3. A-(v), B-(ii), C-(iii), D-(i)
4. None of these

Q. Which of the following is a common monomeric unit for Buna-S and Buna-N?

1. Styrene
2. Acrylonitrile
3. 1, 3-Butadiene
4. All of the above

Q. Natural rubber is

1. An addition polymer of neoprene
2. A condensation polymer of neoprene
3. An addition polymer of isoprene
4. An addition polymer of chloroprene

Q.

Buna-s is a polymer of

1. Butadiene only

2. Butadiene and styrene

3. Styrene only

4. Butadiene and nitryl

Q. Natural rubber is a polymer of:

1. Styrene
2. Ethyne
3. Butadiene
4. Isoprene

Q. Which of the following statements is correct regarding the drawbacks of raw rubber?

1. It is not elastic in nature
2. It has high durability
3. It doesn’t absorb water
4. All of these

Q.

The polymer of natural rubber is:

1. All trans isoprene

2. Buna-N

3. All cis isoprene

4. None of these

Q.

Structures of some common polymers are given. Which one is not correctly represented?

1. 

2. 

3. 

4. 

Q. Which of the following is not produced by condensation polymerisation?

1. Buna-S
2. Dacron
3. Novolac
4. Nylon 6