Crystallization Flashcards

1
Q

Which of the following is not a common method used for purification?
a) Sublimation
b) Crystallisation
c) Electrolysis
d) Chromatography

A

c) Electrolysis

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2
Q

Crystallisation is based on the ___
a) Difference in melting point
b) Difference in boiling point
c) Difference in pressure
d) Difference in solubility

A

d) Difference in solubility

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3
Q

Which of the following is the example of crystallisation process?
a) Purification of alum
b) Purification of sea water
c) Separation of gases from air
d) None of the mentioned

A

a) Purification of alum

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4
Q

At room temperature, the impure compound in crystallisation is ___
a) Soluble
b) Sparingly soluble
c) Insoluble
d) None of the mentioned

A

b) Sparingly soluble

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5
Q

Which of the following is known as mother liquor?
a) Solvent
b) Solute
c) Solution
d) Filtrate

A

d) Filtrate

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6
Q

The solution of impure compound and solvent is concentrated to get _______
a) Unsaturated solution
b) Undersaturaed solution
c) Saturated solution
d) Oversaturated solution

A

c) Saturated solution

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7
Q

Insoluble impurities from solution during crystallization are removed by _______
a) Drying
b) Filtration
c) Heating
d) Cooling

A

b) Filtration

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8
Q

The solution which is obtained after filtration is ____________
a) Suspended solution
b) Clear solution
c) Colloidal solution
d) None of the mentioned

A

b) Clear solution

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9
Q

Crystal phases can be inter-converted by varying _________
a) Temperature
b) Pressure
c) Size
d) Viscosity

A

a) Temperature

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10
Q

The nature of the crystallization process is governed by _____________
a) Thermodynamics
b) Kinetic factors
c) Thermodynamics and Kinetic factors
d) None of the mentioned

A

c) Thermodynamics and Kinetic factors

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