What is most common salt in sea water...? Mcqs

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What is most common salt in sea water...?

(A) Calcium barbonate
(B) Potassium Chloride

(C) Sodium Chloride
(D) Magnesium Sulphate

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What is a mixture of potassium nitrate Charcoal and Sulphur called...?

(A) Paint
(B) Aluminum

(C) Brass
(D) Gunpowder

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Bronze is an alloy of...?

(A) Copper and Bronze
(B) Lead and Tin

(C) Copper and Tin
(D) None of these

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Which gas is used to make soda water...?

(A) Ammonia
(B) Hydrogen

(C) Nitrogen
(D) Carbon Dioxide

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Which gas can be ventilated buildings accumulated in poorly...?

(A) Xenon
(B) Hydrogen

(C) Radon
(D) Helium

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Which Muslim Scientist is considered to be the founder of chemistry...?

(A) Ibn Al Nafees
(B) Jabir ibn Hayyan

(C) Abu Nasr Al-Farabi
(D) None of these

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The element required for solar energy conversion is:...?

(A) Silicon
(B) Germanium

(C) Uranium
(D) None of these

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The process by which a substance absorbs moisture upon exposure to atmosphere is called:...?

(A) Deliquescence
(B) Efflorescence

(C) Dehydrogenation
(D) Desalination

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Biogas produced as a result of anaerobic decay of organic matter consist primarily of_____ gases ...?

(A) N2 & SO2
(B) O2 & N2

(C) NH3 & CO2
(D) None of these

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Nitrogen boils at a temperature of:...?

(A) -96 °C
(B) -196 °C

(C) -296 °C
(D) -310 °C

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