Brass gets discolored in air because of the presence of which of the following gases in air:...? Mcqs

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Brass gets discolored in air because of the presence of which of the following gases in air:...?

(A) Carbon dioxide
(B) Hydrogen sulfide

(C) Nitrogen
(D) Oxygen

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

(A) Zinc
(B) Copper

(C) Aluminum
(D) Iron

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Which is the first element depicted on the Periodic Table...?

(A) Hydrogen
(B) Aluminum

(C) Oxygen
(D) Gold

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How many neutrons in hydrogen:...?

(A) O
(B) 1

(C) 2
(D) 3

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The most abundant metal in the Earth's crust is________...?

(A) Iron
(B) Silicon

(C) Carbon
(D) Aluminum

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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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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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How many Neutrons in Hydrogen:...?

(A) O
(B) 1

(C) 2
(D) None of these

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Which is the oldest freezing method:...?

(A) Contact freezing
(B) Flash freezing

(C) Brine freezing
(D) None of these

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