Crystallization and Dendrimers MCQs – Engineering Chemistry Solved MCQs with Answers
The Crystallisation is based on which of the following?
(A). Â Difference in solubility
(B). The difference in melting point
(C). Â Difference in pressure
(D). The difference in boiling point
(E). None of these
Multiple Choice Question Answer: Â a
The example of crystallisation process is ____________
(A). Â None of the mentioned
(B). Â Purification of alum
(C). Â Separation of gases from air
(D). Â Purification of sea water
(E). None of these
Multiple Choice Question Answer: Â b
Not a common method used for purification is __________
(A). Â Crystallisation
(B). Â Electrolysis
(C). Â Sublimation
(D). Â Chromatography
(E). None of these
Multiple Choice Question Answer:Â b
At the room temperature, what is the impure compound in crystallization?
(A). None of the mentioned
(B). Insoluble
(C). Â Sparingly soluble
(D). Â Soluble
(E). None of these
Multiple Choice Question Answer: Â d
The solution of impure compound and solvent is concentrated to get which of the following?
(A). Â Unsaturated solution
(B). Â Undersaturaed solution
(C). Â Saturated solution
(D). Â Oversaturated solution
(E). None of these
Multiple Choice Question Answer: Â c
How The Insoluble impurities from solution during crystallization are removed?
(A). Â By Filtration
(B). Â By Heating
(C). Â By Drying
(D). Â By Cooling
(E). None of these
Multiple Choice Question Answer: Â a
____________ is known as mother liquor
(A). Â Solute
(B). Â Filtrate
(C). Â Solution
(D). Â Solvent
(E). None of these
Multiple Choice Question Answer:Â b
Which of the following is The solution that is obtained after filtration?
(A). Â Suspended solution
(B). Â Â Clear solution
(C). Â Colloidal solution
(D). Â None of the mentioned
(E). None of these
Multiple Choice Question Answer: Â b
The nature of the crystallization process is governed by which of the following?
(A). Â Thermodynamics
(B). Â Kinetic factors
(C). Â Thermodynamics and Kinetic factors
(D). Â None of the mentioned
(E). None of these
Multiple Choice Question Answer: Â c Crystal phases can be inter-converted by varying which of the following?
(A). Â Size
(B). Â Pressure
(C). Â Viscosity
(D). Â Temperature
(E). None of these
Multiple Choice Question Answer:Â d
Not the other name for dendrimers is __________
(A). Â Dendritic
(B). Â Cascade polymers
(C). Â Deluge polymers
(D). Starburst
(E). None of these
Multiple Choice Question Answer: Â c
What is the Greek meaning of Dendron?
(A). Â Branch
(B). Â Tree
(C). Â Stem
(D). Â Root
(E). None of these
Multiple Choice Question Answer:Â b
The Dendrimers always resemble the star polymers except that each leg of the star exhibits the repetitive branching in manner of a tree.
(A). Â True
(B). Â False
(E). None of these
Multiple Choice Question Answer: Â a
As dendrimers have high surface functionality, so they tend to be which of the following than linear polymers?
(A). More soluble
(B). Â Less soluble
(C ). Equally soluble
(D). Â Very less soluble
(E). None of these
Multiple Choice Question Answer: Â a
Not a component of dendrimer is ___________
(A). Â Central core
(B). Â Interior dendritic structure
(C). Â Stem
(D). Â Exterior surface
(E). None of these
Multiple Choice Question Answer: Â c
Because of lack of chain entanglement, what does dendrimers usually have low?
(A). Â Viscosity
(B). Â Boiling point
(C). Â Solubility
(D). Â Conductivity
(E). None of these
Multiple Choice Question Answer: Â a
Not a potential application of dendrimer is ____________
(A). Â Viscosity modifier
(B). Â Drug delivery system
(C). Â Temperature modifier
(D). Â Molecular sensors
(E). None of these
Multiple Choice Question Answer: Â c
The molecular dimensions of dendrimers lie in which of the following range?
(A). 600-800 nm
(B). Â 100-500 nm
(C). Â 800-1000 nm
(D). Â 1-100 nm
(E). None of these
Multiple Choice Question Answer:Â d
There is a limit to the size of dendrimer segments due to which of the following?
(A). Steric congestion
(B). Â High solubility
(C). Â Cross-linked structure
(D). Â Low viscosity
(E). None of these
Multiple Choice Question Answer: Â a The Dendrimers always have the potential to mimick the behaviour of microscopic and macroscopic molecules.
(A ). Â True
(B). Â False
(E). None of these
Multiple Choice Question Answer:Â b
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