Q. No.Natural rubber has:
1. All trans-configuration
2. Alternate cis - and trans-configuration
3. Random cis - and trans-configuration
4. All cis-configuration
2. Alternate cis - and trans-configuration
3. Random cis - and trans-configuration
4. All cis-configuration
A biodegradable polymer that can be prepared from glycine and aminocaproic acid is:
1. Nylon 2-nylon 6
2. PHBV
3. Buna-N
4. Nylon-6,6
The straight-chain polymer is formed by:
| 1. | Hydrolysis of followed by condensation polymerization. |
| 2. | Hydrolysis of followed by condensation polymerization. |
| 3. | Hydrolysis of by addition polymerization. |
| 4. | Hydrolysis of followed by condensation polymerization. |
In the reaction–
Reagent X is–
1. Triethylaluminium and titanium tetrachloride.
2. Triethyl aluminum.
3. Zeigler Natta Catalyst.
4. Both 1 & 3
Plastic household crockery is prepared by using :
1. Melamine and tetrafluoroethane.
2. Malonic acid and hexamethylene imine.
3. Melamine and vinyl acetate.
4. Melamine and formaldehyde.
The initial reaction in the formation of bakelite is an example of:
1. Aromatic electrophilic substitution
2. Aromatic nucleophilic substitution
3. Free radical reaction
4. Aldol reaction
The polymer that is used as a substitute for wool in making commercial fibres is -
1. Melamine
2. Nylon-6, 6
3. Polyacrylonitrile
4. Buna-N
The incorrect match among the following options is:
| 1. | Terylene— condensation polymer of terephthalic acid and ethylene glycol. |
| 2. | Teflon— thermally stable cross-linked polymer of phenol and formaldehyde. |
| 3. | Perspex— a homopolymer of methyl methacrylate. |
| 4. | Synthetic rubber — a copolymer of butadiene and styrene. |
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