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General Science

CHEMISTRY MCQs

Total Questions : 68

Page 1 of 7 pages
Question 1.

A single covalent bond 


  1.    is formed by the transfer of two electrons
  2.    exists between hydrogen and chlorine is an aqueous solution, of hydrochloric acid
  3.    is longer than a double bond
  4.    does not require energy to disrupt it unlike an ionic bond
 Discuss Question
Answer is Option C. -> is longer than a double bond


Question 2.

Absolute alcohol is


  1.    100% proof
  2.    95% alcohol and 5% water
  3.    200% proof
  4.    rectified spirit
 Discuss Question
Answer is Option C. -> 200% proof

Question 3.

A catalyst


  1.    alters the velocity of reaction
  2.    increases the velocity of a reaction
  3.    decreases the velocity of a reaction
  4.    starts a reaction
 Discuss Question
Answer is Option A. -> alters the velocity of reaction


Question 4.

Alloy steel containing chromium, to resist rusting, is known as


  1.    wrought iron
  2.    cast iron
  3.    hard steel
  4.    stainless steel
 Discuss Question
Answer is Option D. -> stainless steel


Question 5.

A process of very slow regulated cooling is known as


  1.    quenching
  2.    sedimentation
  3.    annealing
  4.    diffusion
 Discuss Question
Answer is Option C. -> annealing


Question 6.

All noble gases are


  1.    colourless
  2.    odourless
  3.    colourless and odourless
  4.    light blue
 Discuss Question
Answer is Option C. -> colourless and odourless


Question 7.

Alcohol contains


  1.    nitrogen,hydrogen and oxygen
  2.    carbon, hydrogen and oxygen
  3.    oxygen, carbon and nitrogen
  4.    hydrogen, chlorides and oxygen
 Discuss Question
Answer is Option B. -> carbon, hydrogen and oxygen


Question 8.

Air is


  1.    an element
  2.    a compound
  3.    a mixture
  4.    a colloid
 Discuss Question
Answer is Option C. -> a mixture


Question 9.

A heat engine can have a maximum efficiency of


  1.    1
  2.    >1
  3.    Q2/Q1
 Discuss Question
Answer is Option C. -> a mixture


Question 10.

A chemical used in photography is


  1.    sodium sulphate
  2.    sodium sulphite
  3.    sodium oxalate
  4.    sodium thiosulphate
 Discuss Question
Answer is Option D. -> sodium thiosulphate


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