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1
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which from following is an example of two dimensional nanostructures?

A
Nanoparticles
B
Thin films
C
Quantum dots
D
Nanowires
2
MHT CET 2023 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which among following statements is NOT true according to principles of green chemistry?

A
In a chemical synthesis the waste product should be zero or minimum.
B
Good atom economy means very few atoms of reactants are incorporated in the product.
C
Only small amounts of unwanted by products are formed.
D
Use of lindane is better than DDT.
3
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following statements about ozone depletion is NOT true?

A
Depletion of ozone is most pronounced over Antarctica.
B
Freons used in aerosol that enters into atmosphere causes depletion of ozone layer.
C
Nitrogen oxide released from cars causes ozone depletion.
D
Due to ozone depletion less amount of UV radiations reaches to earth surface.
4
MHT CET 2019 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the conversion of oxygen to ozone in the atmosphere, nitric oxide in gaseous phase acts as

A
enzyme catalyst
B
inhibitor
C
homogeneous catalyst
D
heterogeneous catalyst
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