Related Questions

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the
A Low impact strength
B High flexibility
C Better finish and surface appearance
D High plastic deformation
Thermosetting polymers as compared to thermoplastic polymers
A Are formed by addition polymerisation
B Have three dimensional structure
C Have linear structure
D None of these
Branched chair polymers as compared to linear polymers have
A Higher melting point
B Higher tensile strength
C Lower density
D None of these
In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher
A Densities
B Melting point
C Tensile strength
D Hardness, rigidity & brittleness
Branched chain polymers compared to linear polymers have higher
A Density
B Tensile strength
C Melting point
D Degree of irregularity in atomic packing
Additives used for promoting the floccula-tion of particles is a/an
A Electrolyte
B Surface active agent
C Both A & B
D Neither A nor B
Many food additives cause cancer
A added substances
B dangerous substances
C natural substances
D additional substances
Many food additives cause cancer.
A natural substances
B dangerous substances
C added substances
D additional substances .
Many food ‘additives’ cause cancer.
A natural substances
B dangerous substances
C added substances
D additional substances
Which of the following additives improves the cetane number of diesel?
A Amyl nitrate
B Ethyl mercaptan
C Napthenic acid
D Tetra ethyl lead

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