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Nanotechnology is an advanced field of study of materials and things on subatomic levels - atoms and molecules. It is the design, production and development of structures of size and shape at nanometer scale. Nanotechnology manipulates the dimension of matter sized from 1 to 100 nanometers. The application of nanotechnology is diverse in the field of semiconductors, energy science, molecular biology and energy storage.  


Nanotechnology Sample Questions:


Question 1: The melting point of nanoparticles ___________.


a) increases                   b) decreases 
c) both (a) and (b)          d) none of these 


Answer: decreases 

Explanation: In nanoparticles, as the dimensions come in the nano range, the melting point reduces significantly. Therefore, the melting point of nanoparticles decreases. 



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Question 2: A one atom sheet of carbon is known as __________. 


a) graphene                b) graphite 
c) diamond                 d) none of these

Answer: graphene

Explanation: Graphene is one atom thick layer of carbon that is extremely strong and conducts electricity.



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Question 3: __________ is the most important property of nanomaterial. 


a) Pressure                  b) Temperature
c) Hardness                 d) Friction 

Answer: Friction 

Explanation: Nanotechnology helps in reducing friction considerably and improves the durability of material. 



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Question 4: The size of atom of nanomaterial is nearly  _________


a) 0.01 nm                 b) 0.1 nm
c) 10 nm                    d) 1 nm 


Answer: 0.1 nm

Explanation: The size of atoms of nanomaterials ranges in the order of 0.1 nm. The smallest naturally occurring atom, helium, is 0.1 nm in size.



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Question 5: _____________ are the class of structures made of rolled up carbon lattices.


a) Fullerenes                     b) Nanobars
c) Graphite                        d) Nanotubes 


Answer: Nanotubes 

Explanation: Nanotubes are hollow tubular nanostructures, which consist of multiple carbon layers wrapped to form a hollow core. 



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Question 6: Nanotechnology was introduced into modern physics by _____________


a) Albert Einstein                     b) Max Planck 
c) Richard Feymann                d) Issac Newton  

Answer: Richard Feymann

Explanation:  Physicist Richard Feymann introduced the concept of nanotechnology in 1959. 



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Question 7: The ratio of ___________ and __________ describes the efficiency of nano substances. 


a) surface area, volume.             b) pressure, volume 
c) weight, volume                        d) volume, weight

Answer: surface area, volume.

Explanation: The large surface area to volume ratio in nanomaterials enhances the performance of nanomaterials. These are highly desirable in the chemical reactions inside batteries and catalysts.



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Question 8: Which of the following fields complement the study of nanoscience and nanotechnology?


a) Newtonian mechanics               b) Classical mechanics 
c) Quantum mechanics                 d) All of these 


Answer: Quantum mechanics

Explanation: Nanotechnology utilises quantum mechanics to study different effects in nanoparticles at a very small scale. Quantum nanoscience is the intersecting space of science at quantum and nano levels. 


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Question 9: Which of the following processes of material is described as nanotechnology?


a) Consolidation                   b) Separation 
c) Processing                       d) All of these 

Answer: All of these 

Explanation:  Nanotechnology, as defined by Professor N. Taniguchi, consists of the processing, separation, consolidation and deformation of materials by one atom or by one molecule.



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Question 10: When semiconductors are reduced to the nano form, they become ____________.


a) pure semiconductor              b) conductor
c) insulator                                d) none of these 


Answer: insulator  

Explanation: When semiconductors are reduced to the nano form, their chemical properties change and there are no spaces available for free electrons to move. Therefore, it becomes an insulator.



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