Related Questions

Plasticisers are added to polymers to improve their
A Tensile strength
B Softness & flexibility
C Acid resistance
D Alkali resistance
Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser?
A Ethylene glycol
B Stearic acid estors
C Tricresyl phosphate
D Esters of phthalic acid
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
Plasticisers are added to synthetic plastics to
A Impart flexibility
B Improve workability during fabrication
C Develop new improved properties not present in the original resin
D All of the above
Plasticisers are added to paints to
A Make it corrosion resistant
B Make glossy surface
C Give elasticity & prevent cracking of the film
D Increase atmospheric oxidation
Which of the following has the weakest intermolecular forces?
A Buna-N
B Nylon-6,6
C Polythene
D Polystyrene
Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces?
A RT
B $${\text{p}} + \frac{{\text{a}}}{{{{\text{V}}^2}}}$$
C V - b
D $$\frac{1}{{{\text{RT}}}}$$
The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong
A Base and strong acid
B Base and weak acid
C Acid and weak base
D None of these
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
A Explosive
B Soap
C Detergent
D Analgesic drug
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A 30°
B 60°
C 90°
D 120°

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