1099+ Important Chemistry MCQ Questions Answers

Q:

A) Mineral	B) Tribe
C) Grass	D) Town

Answer & Explanation Answer: C) Grass

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Q:

Which of the following elements has the lowest melting point?

A) Iron	B) Nitrogen
C) Iodine	D) Lead

Answer & Explanation Answer: B) Nitrogen

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Q:

Ozone is represented as _____.

A) O3	B) H2O2
C) Cl2O	D) N2O

Answer & Explanation Answer: A) O3

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Q:

Aqueous solution of copper sulphate?

A) does not affects litmus	B) affects both red and blue litmus
C) turns blue litmus red	D) turns red litmus blue

Answer & Explanation Answer: C) turns blue litmus red

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Q:

What is the name of the process where gas is directly converted to solids called?

A) Sublimation	B) Deposition
C) Condensation	D) Evaporation

Answer & Explanation Answer: B) Deposition

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Q:

Atomic number of which of the following elements is greater than that of Neon?

A) Oxygen	B) Magnesium
C) Nitrogen	D) Boron

Answer & Explanation Answer: B) Magnesium

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Q:

Matter is classified as a

A) pure substance	B) mixture
C) both 1 & 2	D) none of the above

Answer & Explanation Answer: C) both 1 & 2

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Q:

Acid Rain has pH value of

A) 5.5 or less	B) 12.5 or more
C) 10.5 or more	D) 8.5 or more

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