Natural rubber has

1. All trans-configuration.

2. Alternate cis - and trans-configuration.

3. Random cis - and trans-configuration.

4. All cis-configuration.

Caprolactam is used for the manufacture of-

1. Nylon-6
2. Polythene
3. Terylene
4. Nylon-6 6

Dacron is a polymer of : 

1. Propylene and para HO—(C₆H₄)—OH

2. Benzoic acid and ethanol

3. Terephthalic acid and ethylene glycol

4. Benzoic acid and para HO—(C₆H₄)—OH

Which of these is not a monomer for a high molecular mass silicone polymer?

1. MeSiCl₃

2. Me₂SiCl₂

3. Me₃SiCl

4. PhSiCl₃

Which of the following is the monomer of neoprene ?

1. CH₂=CH-c=CH

2. CH₂=$\begin{array}{c}\underset{|}{\mathrm{C}}\\ {\mathrm{CH}}_3\end{array}$-CH=CH₂

3. $\begin{array}{ccccccc}{\mathrm{CH}}_2& =& \underset{\mathrm{Cl}}{\underset{|}{\mathrm{C}}}& -& \mathrm{CH}& =& {\mathrm{CH}}_2\end{array}$

4. CH₂=CH-CH=CH₂

Which of the following statements is false?

1. Artificial silk is derived from cellulose

2. Nylon-66 is an example of elastomer

3. The repeat unit in natural rubber is isoprene

4. Both starch and cellulose are polymers of glucose

The structure of neoprene polymer is: 

1.
2.
3.

4.

The structures of some common polymers are given. The incorrect match is:

(a)		(b)
(c)		(d)

The straight chain polymers formed by:-

1. hydrolysis of (CH₃)₃SiCl followed by condensation polymerisation

2. hydrolysis of CH₃SiCl₃ followed by condensation polymerisation

3. hydrolysis of (CH₃)₄Si by addition polymerisation 

4. hydrolysis of (CH₃)₂SiCl₂ followed by condensation polymerisation

Incorrect statement among the given options is: 

1. In vulcanisation, the formation of sulphur bridges between different chains make rubber harder and stronger.

2. Natural rubber has the trans-configuration at every double bond.

3. Buna-S is a copolymer of butadiene and styrene.

4. Natural rubber is a 1,4-polymer of isoprene.