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Chemistry

Chemistry
The octane number of zero is assigned to

n-heptane
iso-octane
2-methyl octane
3-methyl octane

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Chemistry
Candle is a mixture of

Bees wax and stearic acid
Paraffin was and stearic acid
Bees wax and paraffin wax
Higher fatty acids and stearic acid

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Chemistry
What is the most common salt in sea water ?

Potassium chloride
Sodium chloride
Magnesium sulphate
Calcium carbonate

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Chemistry
Yellow Cake' an item of smuggling across border is

A crude from of cocaine
Unreformed gold
Uranium oxide
A crude from of heroin

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Chemistry
Alum stops bleeding in minor cuts because of

Coagulation
Dialysis
Solvation
Emulsion

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Chemistry
The chemical name of 'Hypo' commonly used in photography is

Sodium nitrate
Sodium thiosulphate
Silver iodide
Silver nitrate

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