Engineering Chemistry Nanotechnology Online Exam Quiz
Engineering Chemistry Nanotechnology GK Quiz. Question and Answers related to Engineering Chemistry Nanotechnology. MCQ (Multiple Choice Questions with answers about Engineering Chemistry Nanotechnology
The efficiency of today’s best solar cell is about ___________
Options
A : 15-20%
B : 40%
C : 50%
D : 75%
Which of the following is the application of nanotechnology to food science and technology?
Options
A : Agriculture
B : Food safety and biosecurity
C : Product development
D : All of the mentioned
Quantum confinement results in ___________
Options
A : Energy gap in semiconductor is proportional to the inverse of the square root of the size
B : Energy gap in semiconductor is proportional to the inverse of the size
C : Energy gap in semiconductor is proportional to the square of size
D : Energy gap in semiconductor is proportional to the inverse of the square of size
Which of the following is an example of bottom-up approach for the preparation of nanomaterials?
Options
A : Etching
B : Dip pen nano-lithography
C : Lithography
D : Erosion
Which of the following is an example of top-down approach for the preparation of nanomaterials?
Options
A : Gas phase agglomeration
B : Molecular self-assembly
C : Mechanical grinding
D : Molecular beam epitaxy
What are the advantages of nano-composite packages?
Options
A : Lighter and biodegradable
B : Enhanced thermal stability, conductivity and mechanical strength
C : Gas barrier properties
D : All of the mentioned
The properties like melting point, solubility, color, etc changes on varying the ___________
Options
A : Size
B : Composition
C : Surface properties
D : None of the mentioned
The properties like dispersibility, conductivity, etc changes on varying the ___________
Options
A : Size
B : Composition
C : Surface properties
D : None of the mentioned
Which of the following is the principal factor which causes the properties of nanomaterials to differ significantly from other materials?
Options
A : Size distribution
B : Specific surface feature
C : Quantum size effects
D : All of the mentioned
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