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Chemistry

Chemistry
Silk fibre chemically is :

Fat
Protein
Carbohydrate
Cellulose

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Chemistry
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ?

Chlorofluorocarbon
Carbon dioxide
Sulphur dioxide
Nitrous oxide

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Chemistry
Major gaseous pollutant of the thermal power station is

NO2
NH3
H2 S
SO2

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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
C
A
B

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Chemistry
A balloon filled with helium rises in air because

Air exerts an upward force on the balloon
Helium is less dense than air
The balloon is weightless
Helium pushes down on the air below the balloon

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Chemistry
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

limonene
cineole
geraniol
engenol

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