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Chemistry

Chemistry
Which one of the following chemicals helps in fruit ripening?

Ethephon
Isoproturan
Atrazine
Malathion

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Chemistry
Atomic number of an atom gives the number of which of the following ?

Electrons
Neutrons and protons
Protons
Neutrons

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Chemistry
Formation of ozone hole is maximum over

India
Africa
Europe
Antarctica

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Chemistry
Ethanol containing 5% water is known as

Denatured spirit
Rectified spirit
Methylated alcohol
Power alcohol

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Chemistry
Williamson's synthesis is widely used in the laboratory preparation of

Ethers
Aldehydes
Alcohols
Esters

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Chemistry
Colloids can be purified by

Condensation
Condensation
Condensation
Dialysis

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