Related Questions

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
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
Branched chair polymers as compared to linear polymers have
A Higher melting point
B Higher tensile strength
C Lower density
D None of these
Branched chain polymers compared to linear polymers have higher
A Density
B Tensile strength
C Melting point
D Degree of irregularity in atomic packing
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
Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.
A Thermoplastic
B Thermosetting
C Elastometric
D Brittleness
The ratio of linear stress to the linear strain is called
A Modulus of rigidity
B Modulus of elasticity
C Bulk modulus
D Poisson's ratio
The word 'linear' in linear programming is used to describe:
A relationship among two or more variables in a straight line
B relationship among two or more variable which are directly proportional
C relationship among two or more variables is linear
D all of the above
E None of the above
The ratio of linear stress to linear strain is termed as the
A Modulus of elasticity
B Modulus of rigidity
C Bulk modulus
D None of these
Which of the following polymers belong to the class of formaldehyde resin?
A Melamine resins
B Teflon
C Dacron
D None of these

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