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

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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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The most abundant metal in the earth's crust is:...?

(A) Zinc
(B) Copper

(C) Aluminum
(D) Iron

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Which of the following gases is used for refrigeration...?

(A) Chlorine
(B) Ammonia

(C) Phosphine
(D) Carbon Dioxide

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What are liquids that evaporate quickly, called...?

(A) Volatile
(B) Viscous

(C) Evaporative
(D) None of these

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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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What type of acid is used in car batteries...?

(A) Hydrochloric acid
(B) Hydrofluoric acid

(C) Nitric acid
(D) Sulphuric acid

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The gases used in different types of welding would include:...?

(A) Oxygen and hydrogen
(B) Oxygen, hydrogen, acetylene and nitrogen

(C) Oxygen, acetylene and argon
(D) Oxygen and acetylene

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What is called laughing gas...?

(A) Nitrous Oxide
(B) Nitric Oxide

(C) Nitrogen Oxide
(D) Nitrogen Peroxide

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Cooking gas is also called...?

(A) Butane
(B) Hexane

(C) Propane
(D) LPG

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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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