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
At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the
A Third law of thermodynamics
B Second law of thermodynamics
C Nernst heat theorem
D Maxwell's relations
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
A miscommunication frequently held by novice writers is that sentence structure mirrors thought: the more convoluted the structure, the more ....... the ideas.
A Complicated
B Engaged
C essential
D fanciful
Quartz is a crystalline form of
A Alumina
B Glass
C Silica
D Limestone
The fusion of a crystalline solid at its melting point to form a liquid at the same temperature is accompanied by
A Decrease in enthalpy corresponding to evolution of heat
B Decrease of entropy
C Increase in enthalpy corresponding to absorption of heat
D No change in enthalpy
For continuous drying of grannular or crystalline material, the dryer used is the __________ dryer.
A Tunnel
B Tray
C Rotary
D None of these
Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.
A Nylon
B Polyacrylonitrile
C Polypropylene
D Polyester
The absolute entropy for all crystalline substances at absolute zero temperature is
A Zero
B Negative
C More than zero
D Indeterminate

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