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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Ammonia
Urea
Chlorine
Sulphur-di- oxide

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Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Iron
Silicon
Magnesium
Oxygen

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Chemistry
The luster of a metal is due to

its high density
presence of free electrons
its chemical inertness
its high polishing

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Chemistry
The biogas used for cooking is a mixture of which of the following?

Methane and carbon monoxide
Isobutane and propane
Methane and carbon dioxide
Carbon dioxide and oxygen

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Chemistry
The manufacture of iron from iron ore involves the process of

Oxidation
Fractional distillation
Electrolysis
Reduction

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Chemistry
A polymeric substance used to make parachute is

Rayon
Viscose
Terylene
Cotton

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MORE MCQ ON Chemistry

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