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Chemistry

Chemistry
Which of the following is a natural polymer?

Starch
Nylon
Bakelite
Polythene

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Chemistry
The most suitable unit for expressing nuclear radius is :

Fermi
Nanometre
Micron
Angstrom

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Chemistry
A substance which readily forms colloidal solution in contact with water is called

Associated colloid
Hydrophobic colloid
Extrinsic colloid
Hydrophilic colloid

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Chemistry
Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234

D
A
C
B

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Chemistry
Which of the following is ozone depleting pesticide ?

Methyl bromide
D.T.
Ethylene ozonide
Benzene

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Chemistry
Aerated water contains

SO2
H2
CO2
NO2

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