Related Questions

Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
A Glycerol
B Nitro cellulose
C Camphor
D None of these
During crystallisation, formation of crystal can occur in __________ solution only.
A Saturated
B Supersaturated
C Undersaturated
D All of the above
In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is
A More
B Less
C Same
D More or less; depends on the nature of solution
Crystallisation of solids from a homogeneous solution is a/an __________ process.
A Exothermic
B Mildly endothermic
C Highly endothermic
D None of these
The crystallisation of a solute from a solution may be done by
A Removal of pure solvent by evaporation
B Change of temperature thereby causing supersaturation
C Changing the nature of the system by the addition of a more soluble material
D All of the above
Solution X contains 7% (by weight) of liquid M and solution Y contains 14.5% (by weight) of liquid M. If 3 grams of solution X is mixed with 2 grams of solution Y, then liquid M accounts for what percent of the weight of the resulting solution?
A 6.09%
B 10%
C 10.75%
D 21.5%
100 kg of solution A is mixed with 60 kg of solution B . If solution A has tin and copper in the ratio 1: 4 and solution B has lead and tin in the ratio 3 :2 then what is the amount of tin in the new solution?
A 70 kg
B 36 kg
C 44 kg
D 56 kg
Solution X is 10% percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 25 percent alcohol by volume?
A 600
B 800
C 300
D 250
E None of these
Rate of crystallisation does not depend upon the
A Extent of supersaturation
B Turbulence within the solution
C Number and active surface area of the crystals
D None of these
The reverse process of fractional crystallisation is called
A Stripping
B Leaching
C Differential distillation
D Absorption

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