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Chemistry

Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Iron
Oxygen
Magnesium
Silicon

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Chemistry
A non-electronic conductor is

Copper Sulphate
None of these
Iron
Gas Carbon

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Chemistry
During fermentation of sugar, the compound which is always formed is :

Ethylene
Acetic Acid
Methyl Alcohol
Ethyl Alcohol

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Chemistry
Major gaseous pollutant of the thermal power station is

H2 S
NH3
SO2
NO2

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Chemistry
Soap is prepared by boiling caustic soda with

Kerosene oil
Alcohol
Glycerine
Fats

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Chemistry
Which of the following is not a nucleon?

Proton
Electron
Neutron
Positron

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