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Chemistry

Chemistry
What do you understand by the term Espuma ?

Calcium
Soap
Foam
Salt

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Chemistry
Among the following, which is always found in free-state in nature?

Sodium
Copper
Gold
Silver

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Chemistry
Activated Charcoal is used to remove colouring matter from pure substances by

Oxidation
Adsorption
Bleaching
Reduction

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Chemistry
Which one of the following metals is used to galvanise iron ?

Zinc
Copper
Lead
Mercury

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Chemistry
'Vinegar' is a commercial name of

Oxalic acid
Acetic acid
Hydrochloric acid
Citric acid

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Chemistry
Which of the following is the main nitrogenous waste in humans ?

Ammonium Nitrate
Uric Acid
Ammonia
Urea

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