1099+ Important Chemistry MCQ Questions Answers

Q:

Metal oxides which react with acids as well as bases are called

A) Amphoteric oxides	B) Neutral oxides
C) Basic oxides	D) Acidic oxides

Answer & Explanation Answer: A) Amphoteric oxides

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Q:

Which of the following is not correct with reference to Bio-sand Water Filter?

A) It deactivates or kills pathogens	B) Sedimentation removes larger particles
C) Filtration removes smaller particles	D) High quality water is always assured

Answer & Explanation Answer: D) High quality water is always assured

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Q:

What are stars primarily made of?

A) Oxygen and Hydrogen	B) Hydrogen and Carbon
C) Hydrogen and Helium	D) Oxygen and Helium

Answer & Explanation Answer: C) Hydrogen and Helium

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Q:

The hardest natural substance is

A) Graphite	B) Diamond
C) Iron	D) Copper

Answer & Explanation Answer: B) Diamond

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Q:

Which term describes an enzyme?

A) reactant	B) catalyst
C) substrate	D) product

Answer & Explanation Answer: B) catalyst

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Q:

Which of the following is used to get relief when you have been stung by a honeybee?

A) Common salt	B) Baking soda
C) Acetic acid	D) Washing soda

Answer & Explanation Answer: B) Baking soda

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Q:

If the electronic configuration of elements A and B are $1 S^{2}, 2 S^{2} 2 P^{6}, 3 S^{1} and 1 S^{2}, 2 S^{2} 2 P^{6}, 3 S^{2} 3 P^{4}$ respectively, then the formula of the compound formed by the combination of these elements will be:

A) AB3	B) AB2
C) A2B	D) AB

Answer & Explanation Answer: C) A2B

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Q:

Which of the following metals reacts vigorously with cold water?

A) Potassium	B) Aluminium
C) Zinc	D) Iron

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