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Chemistry

Chemistry
Water can be separated from alcohol water mixture by

Evaporation
Sublimation
Decantation
Distillation

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Chemistry
Freon' used as refrigerants is chemically

Chlorofluoro hydrocarbon
Fluorinated aromatic compound
Chlorinated hydrocarbon
Fluorinated hydrocarbon

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Chemistry
The most abundant constituent of atmospheric air is :

Oxygen
Nitrogen
Hydrogen
Carbon

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Chemistry
The new strain of bacteria produced by biotechnology in alcohol industry is

Pseudomonas putida
Bacillus subtilis
Escherichia coli
Saccharomyces cerevisiae

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Chemistry
Which one of the following has greatest mass ?

Neutron
Electron
Hydrogen nucleus
Proton

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

Esters
Alcohols
Ethers
Aldehydes

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