Rubber

Q.

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

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

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

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

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

Q. On complete hydrogenation, natural rubber produces:

1. Ethylene-propylene copolymer
2. Vulcanised rubber
3. Polypropylene
4. Polybutylene

Q.

Inorganic polymer among the following is

1. Starch

2. Silicone rubber

3. Rayon

4. Natuarl rubber

Q.

Write the name and the structure of the monomer of polythene.

Q.

'Cis-1, 4-polyisoprene' is

1. Thermosetting plastic

2. Thermoplastic

3. Resin

4. Elastic (rubber)

Q.

Is rubber a polymer?

Q.

Natural rubber has

1. alternate cis- and trans-configuration

2. random cis- and trans-configuration

3. all cis- configuration

4. all trans- configuration

Q. Buna-S rubber is which of the following of 1-3-butadiene and styrene

1. Copolymer
2. Step growth polymer
3. Condensation polymer
4. Polymers

Q.

How does the presence of double bonds in rubber molecules influence their structure and reactivity ?

Q.

Buna-s is a polymer of

1. Butadiene only

2. Butadiene and styrene

3. Styrene only

4. Butadiene and nitryl

Q.

Write the name and structures of the monomers of the following polymers.

Buna - S

Buna - N

Dacron

Neoprene

Q.

What is a polymer in chemistry?

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

Q.

Assertion (A) For making rubber synthetically, isoprene molecules are polymerised.

Reason (R) Neoprene (a polymer of chloroprene) is a synthetic rubber.

(a) Assertion and Reason both are correct statement But reason does not explain Assertion.

(b) Assertion and Reason both are correct statement and Reason explains the Assertion.

(c) Both assertion and reason are wrong statements.

(d) Assertion is correct statement and Reason is wrong statement.

(e) Assertion is wrong statement and reason is correct statement.

Q.

The polymer in which intermolecular force of attraction is the weakest is:

1. PVC

2. Cellulose

3. Nylon

4. Natural rubber

Q.

Differentiate between rubbers and plastics on the basis of intermolecular forces.

Q. Which of the following is a characteristic property of Teflon?

1. Highly reactive
2. Non-inflammable and resistant to heat
3. Highly corrosive
4. All of the above

Q.

Identify the polymer given below.

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.

Write the names of the monomers of the following polymers such as bakelite and nylon-$6,6$.

Q. X on polymerisation gives neoprene. Identify X.

1. 1-Chloro-1, 3-butadiene
2. 2-chloro-1, 3-butadiene
3. 1-Methyl-1, 3-butadiene
4. 2-Methyl-1, 3-butadiene

Q. The monomeric units of terylene are glycol and which of the following?

1. 
2. 
3. 
4. 

Q.

To have practical applications why are cross links required in rubber?

Q. Which of the following is monomer of natural rubber?

1. Chloroprene
2. Caprolactum
3. Styrene
4. Isoprene

Q.

Among the following, the wrong statement is

1. PTFE is Teflon

2. SBR is a natural rubber

3. LDPE is low density polythene

4. PMMA is plexiglass

Q.

Which is the monomer of neoprene in the following ?

1. 

2. 

3. 

4. 

Q. Write the names and structures of the monomers of the following polymers:

Q. Which of the following is used in the manufacture of Synthetic Rubber?

1. Nylon
2. Dacron
3. Neoprene
4. Cis-polyisoprene

Q. Beilstein test is reliable test for halogens in organic compounds.

1. True
2. False

Q. Why cine product is major product in case of Benzyne mechanism?