Polymer Technology Mcqs

Q:

Which of the following polymer continues to burn even on the removal from flame?

A) chlorinated rubber B) poly vinyl chloride
C) butyl rubber D) nylons
 
Answer & Explanation Answer: C) butyl rubber

Explanation: Butyl rubber continues to burn even on the removal from flame while the rest other polymers burns but self extinguishes on removal from flame.

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Q:

What is the colour of flame when chlorinated rubber is heated?

A) blue B) blue green
C) yellow D) yellow green
 
Answer & Explanation Answer: D) yellow green

Explanation: Chlorinated rubber produces a yellow green flame with strongly acidic fumes on heating.

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15
Q:

Polymers of type A produce yellow smoky flame on heating with an unpleasant and sweet smell. They also melt or char giving acidic distillate and black residue.
Which of the following could be A?

A) polyisoprenes B) polyesters
C) nylons D) ethyl cellulose
 
Answer & Explanation Answer: B) polyesters

Explanation: Polyesters produce yellow smoky flame with unpleasant and sweet smell on heating. It chars giving acidic distillate and black residue.

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22
Q:

Which of the following polymer produces an odour resembling burning paraffin wax on heating?

A) polyethylene B) polyesters
C) cellulose D) butyl rubber
 
Answer & Explanation Answer: A) polyethylene

Explanation: Polyethylene produces a smell like burning paraffin wax on heating.

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23
Q:

Which of the following polymers do not produce black residue on heating?

A) chlorinated rubber B) poly (vinyl alcohol)
C) poly (vinyl chloride) D) none of the mentioned
 
Answer & Explanation Answer: D) none of the mentioned

Explanation: All the polymers mentioned, i.e. chlorinated rubber, poly vinyl alcohol and poly vinyl chloride produce black residue on heating.

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43
Q:

Which of the following polymers does not produce a smoky flame?

A) polybutadiene rubber B) gutta percha
C) poly (vinyl acetate) D) polysulphide rubber
 
Answer & Explanation Answer: D) polysulphide rubber

Explanation: Polysulphide rubbers produce a bluish, smoke free flame while the rest other rubbers produce smoky flame.

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16
Q:

Which of the following polymer produces camphor like odour on heating?

A) ethyl cellulose B) cellulose nitrate
C) polyacrylonitrile D) cellulose acetate
 
Answer & Explanation Answer: B) cellulose nitrate

Explanation: Cellulose nitrate produces camphor like smell as it is plasticized with camphor.

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23
Q:

A polymer X produces a pale yellow flame with light blue-green edge on heating. It produces a fish like odour and is alkaline in nature. Which of the following polymer represents X?

A) phenol formaldehyde resin B) melamine formaldehyde resin
C) nylons D) butyl rubber
 
Answer & Explanation Answer: B) melamine formaldehyde resin

Explanation: Melamine formaldehyde resin produces a similar flame and produces a fish like smell on heating.

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