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Chemistry

Chemistry
Which metal is extracted from sea water?

Beryllium
Magnesium
Potassium
Aluminium

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Chemistry
Ultraviolet rays can be used in water treatment as

Disinfectant
Hydrolyser
Flocculator
Precipitator

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Chemistry
Iron is extracted from

Bauxite
Haematite
Dolomite
Cinnabar

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Chemistry
Which halide is used in making sensitive emulsion on photograhic film?

Silver chloride
Sodium chloride
Silver iodide
Silver bromide

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Chemistry
Which of the following is a metallic ore ?

Galena
Mica
Feldspar
Quartz

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Chemistry
Carborundum is another name of

Calcium carbide
Silicon oxide
Calcium oxide
Silicon carbide

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