PPSC Chemistry Part VII NanoChemistry Online Test With Answers

PPSC Chemistry Part VII NanoChemistry Online Test

Sr. # Questions Answers Choice
1 The size of nanoparticles is between __________ nm 100 to 1000 1 to 100 0.1 to 10 0.01 to 1
2 In a bucky ball each carbon atom in bound in __________ adjacent carbon atoms. 1 2 3 4
3 The ration of thermal conductivity of silver to that of a carbon nanotube is. 100 : 1 1 :100 10:1 1:10
4 The tensile strength of a carbon nanotube is __________ times that of steel. 10 25 100 1000
5 The diameter of fly ash particles is._________ micro meter 5-10 10-20 20-30 100
6 Nano technology in other words is. Carbon engineering Atomic engineering Small technology Microphysics
7 __________ are the extensions of bucky balls. Goodesic domes Hexagons Carbon nanotubes AFM and STM
8 The hardest material found in nature is Steel Topaz Diamond Quartz
9 20 micron =____________________ nm 20 x10<sup>-9</sup> 20000 200 20x10<sup>9</sup>
10 The size of quantum dot is ________________m 5 5 x 10<sup>-9</sup> 5 x10<sup>-10</sup> 5 x10<sup>-11</sup>
11 The diameter of hydrogen atom is.______________nm 10 1 0.1 0.01
12 1 meter = ___________ nm 10<sup>9</sup> 10<sup>-9</sup> 10<sup>10</sup> 10<sup>-10</sup>
13 The diameter of a bucky ball is about _____________ <div> o</div>1 A 1 nm <div> o</div>100 A 10 nm
14 A diameter of human hair is approximately ________________ m 75000 75 7.5 x 10<sup>-5</sup> 7.5 x 10<sup>-9</sup>
15 The size of E coli bacteria is._____________ nm 75000 2000 200 5
16 1 nanometre =___________ cm 10<sup>-9</sup> 10<sup>-8</sup> 10<sup>-7</sup> 10<sup>-6</sup>
17 "There is a plenty of room at the bottom" This was stated by Issac Newton Albert Einstein Richard Feynman Eric Drexler
18 What is graphene. A new material made from carbon nanotubes A one atom thick sheet of carbon This film made from fullerene A software tool to measure and graphically respresent nanoparticles.
19 Opticla tweezers Are used to remove facial hair with miniaturized laser beams use light to manipulate particles as small as single atom Are a nanotechnology bases tool for stamp collectors Don't exist
20 What exactly is quantum dot A semiconductor nanostructure that confines the motion of conduction band electrons, valence band holes or excitation in all three spatial directions The sharpest possible tip of an atomic force microscope A fictional term used in science fiction for the endpoints of wormholes Unexplained spots that appear electron microscopy images of nanostructures smaller than 1 nanometer
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