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Chemistry

Chemistry
Surface water is a better source of drinking water because it is poor in

Arsenic
Algae
Dust
Bacteria

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Helium
Argon
Nitrogen
Neon

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Chemistry
Number of neutrons in an atom of hydrogen is

Two
Three
One
Zero

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Chemistry
Which one of the following contains maximum percentage of carbon ?

Cast iron
Wrought iron
Stainless steel
High speed steel

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Chemistry
Sour milk contains

Acetic acid
Lactic acid
Tartaric acid
Citric acid

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Chemistry
The most commonly used bleaching agent is

sodium chlorine
chlorine
alcohol
carbon dioxide

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