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Chemistry - General Science Short Questions and Answers for Competitive Exams

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Download in pdf Chemistry multiple choice questions(mcqs) & answers. These general awareness quiz objective questions answers include mcqs on proton, neutron, lithium etc.
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(21) The element that is in the highest percentage in the composition of the earth :
[A] Silicon
[B] Oxygen
[C] Magnesium
[D] Iron

Comment

Answer: Option [B]
(22) Which are the fundamental particles present in the nucleus of an atom ?
[A] Electron, proton
[B] Proton, neutron
[C] Neutron, electron
[D] Neutron, positron

Comment

Answer: Option [B]

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(23) Which of the following alkali metals has highest specific heat ?
[A] Caesium
[B] Rubidium
[C] Potassium
[D] Lithium

Comment

Answer: Option [D]
(24) What are the metallic constituents of hard water ?
[A] Magnesium, calcium and tin
[B] Iron, tin and calcium
[C] Calcium, magnesium and iron
[D] Magnesium, tin and iron

Comment

Answer: Option [C]
(25) Which of the following imparts deep blue colour to glass ?
[A] Cobalt oxide
[B] Cupric oxide
[C] Phosphorus
[D] Nickel oxide

Comment

Answer: Option [A]
(26) Which of the following elements is non-radioactive ?
[A] Uranium
[B] Thorium
[C] Plutonium
[D] Zirconium

Comment

Answer: Option [D]
(27) What is the purest form of iron ?
[A] Steel
[B] Cast iron
[C] Pig iron
[D] Wrought iron

Comment

Answer: Option [D]
(28) Which of the following metals form an amalgam with other metals ?
[A] Lead
[B] Tin
[C] Zinc
[D] Mercury

Comment

Answer: Option [D]
(29) Which of the following is the main nitrogenous waste in humans ?
[A] Ammonia
[B] Urea
[C] Uric Acid
[D] Ammonium Nitrate

Comment

Answer: Option [B]
(30) Drinking soda is :
[A] Alkaline
[B] Acidic
[C] Neutral
[D] Oxidant

Comment

Answer: Option [B]

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