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Chemistry

Chemistry
The most electronegative element among the following is

bromine
sodium
oxygen
fluorine

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Chemistry
In drinking water supply, which of the following treatments is not involved

Coagulation
Sedimentation
Softening
Disinfection

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Chemistry
Which of the following is used as a preservative to protect processed food?

Sodium metabisulphite
BHT
Saccharin
Sodium sulphate

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Chemistry
Which one is the most dense liquid from the below

Choloform
None of these
Gasolin
Water

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Chemistry
The most extensive, commercially useful source of thorium as monazite sand occurs in India at

Travancore coast
Gujarat coast
West Bengal coast
Orissa coast

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Chemistry
The Refrigerant 'FREON' is

Fluorspar and Felspar
Difluoro Dichloro Methane
Calcium Tetra Fluoride
Hydrofluosilicic Acid

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