Which of the following is used to make non stick cookware ?

1. PVC

2. Polysterene

3. Polyethylene

4. PTFE

Subtopic:  Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
 67%
From NCERT
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Polyethene, PVC, teflon and neoprene are example of -

1. Homopolymer.

2. Addition hetropolymer.

3. Biodegradable polymer.

4. Copolymer.

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
From NCERT
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Product (E) is "

(1) Nylon 66

(2) Nlyon 6

(3) Styrene

(4) Polystyrene

Subtopic:  Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
 52%
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Acetate rayon is prepared from:

(1) acetic acid

(2) glycerol

(3) starch

(4) cellulose

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 53%
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Rubber is heated with sulfur and the process is known:

1. galvanization

2. vulcanization

3. bessemerization

4. sulphonation

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 94%
From NCERT
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Terylene is a:

(1) Polyamide                     

(2) Polyester

(3) Polyether                       

(4) Long chain hydrocarbon

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 83%
From NCERT
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Thermosetting plastics are:

1. Cross-linked polymers

2. Don’t melt or soften on heating

3. Cross-linking is usually developed at the time of moulding where they harden irreversibly

4. All of the above

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 83%
From NCERT
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Which are true for terpolymer?

(1) Contains three monomers

(2) ABS plastic

(3) A polymer of acrylonitrile, butadiene and styrene

(4) All of the above

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 86%
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Which is/are true for elastomers?

1. These are synthetic polymers possessing elasticity

2. These possess very weak intermolecular forces of attractions between polymer chains

3. Vulcanised rubber is an example of elastomer

4. All of the above

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 89%
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If N1, N2, N3,.... are the number of molecules with molecular masses M1, M2, M3..... respectively, then mass average molecular mass is expressed.

1. ΣNiMi2ΣNiMi

2. ΣNiMiΣNi

3. ΣMi2ΣNi

4. ΣNiMiΣMi

 

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
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