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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Cooking gas is also called...?

(A) Butane
(B) Hexane

(C) Propane
(D) LPG

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Which gas is known as laughing gas...?

(A) Nitrous oxide N2O
(B) Nitrogen

(C) Methane
(D) None of these

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Solid can be converted directly to the gaseous state. This process is known as:...?

(A) Sublimation
(B) Evaporation

(C) Condensation
(D) Diffusion

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Which of the following is the least polluted gas...?

(A) Carbon
(B) Nitrogen

(C) Chlorine
(D) None of these

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Which of the following is an electrolyte...?

(A) NaCl
(B) Oil

(C) Ethanol
(D) None of these

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The pH of milk is...?

(A) 6
(B) 6 point 7

(C) 7
(D) 7 point 5

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Which of the following is used in normal pencils...?

(A) Graphite
(B) Silicon

(C) Charcoal
(D) Slate

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A chemical solution has 8% acid the acid is 15 ml the total volume of solution is...?

(A) 179.5 ml
(B) 180.5 ml

(C) 187.5 ml
(D) None of these

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Which of the following gases is most predominant in the Sun...?

(A) Helium
(B) Hydrogen

(C) Nitrogen
(D) Ozone

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