Test Details

Green Chemistry and Nanochemistry

Feb 01, 7:00 PM

60 minutes

Feb 01, 8:00 PM

68.0 marks

MCQ

40 questions

Zaware Atish

MSc Bed (organic chemistry)

Class Details

Chemistry

12th Chemistry

Chemistry

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Chemical Bonding

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Question Text

Question 1 :
Chlorofluorocarbons have been in use in refrigerators and air conditioners are proved to be unfriendly to the environment. Substitutes to these compounds which are friendly to the environment are:

Question 2 :
Which of the following reaction occur when urea is added to soil as a fertilizer?

Question 3 :
Biomass is used instead of extensive use of petroleum. This is an application of :

Question 4 :
A raw material feedstock should be renewable rather than depleting, whenever technically and ecomonically practical, is an objective of:

Question 5 :
Switching from air to pure oxygen eliminates the NO production. This is an application of:

Question 6 :
Plastic used to preserve yogurts is replaced with a polymer called polylactic acid is an example of _______.

Question 7 :
Which of the following gas is used in bleaching of paper?

Question 8 :
Taking chromium and arsenic, which are toxic, out of pressure-treated wood, and using new less toxic chemicals for bleaching paper, are examples of _________.

Question 9 :
_______ is an environment-friendly product and better than halons which are used to extinguish fire.

Question 11 :
To manufacture computer chips, many chemicals, large amounts of water, and energy are required which is harmful to environment. a process is discovered which significantly reduces the quantities of chemicals, energy, and water needed to produce chips. This is an application of:

Question 15 :
Materials which have one dimension in the nanoscale (and are extended in the other two dimensions) are:

Question 16 :
The size of a nano particle is about _________ times smaller than the diameter of a single strand of human hair.

Question 17 :
Which one of the following organisation's iron and steel plant was build to use charcoal as a source of power, to start with, but later switched over to hydroelectricity ?

Question 19 :
In which of the following type of nano material all the dimensions are measured within the nano scale?

Question 21 :
________ reduces toxicity, minimizes waste, saves energy, and cuts down on the depletion of natural resources. It allows for advances in chemistry to occur in a much more environmentally benign way.

Question 23 :
Which of the following practices will not come under green chemistry?

Question 24 :
The size of a nano particle is ____________ of a typical bacterium.

Question 26 :
An important parameter that determines the functioning of nano material is surface area to volume ratio. Because of which reason small granules of sugar dilute faster than big piece of sugar cube?

Question 27 :
Which of the following nano materials are examples of three dimensional nano materials?

Question 30 :
Which of the following nano materials are examples of one dimensional nano materials?

Question 32 :
Which of the following nano materials are examples of two dimensional nano materials?

Question 33 :
In future nanomaterials can be used to detect human cancer at its __________.

Question 35 :
An important parameter that determines the functioning of nano material is surface area to volume ratio. Because of which reason small granules of sugar dilute faster than big piece of sugar cube?

Question 36 :
Bulk gold appears yellow in color where as nano sized gold appears in :

Question 37 :
In which of the following type of nano material two dimensions are outside the nano scale?

Question 38 :
Nano science deals with the scientific study of objects with sizes in the ____ range in at least one dimension.

Question 39 :
Nanoclusters have at least one dimension between .................. nanometers and a narrow size distribution.

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