Chemistry Exam Past Questions and Answers | JAMB, WAEC and NECO

Chemistry is the study of the substances that make up matter. It looks at their properties, how they react with each other, and how these reactions can create new substances.

• Question 131:

  2-methylprop-1-ene is an isomer of

  Options:
  A) 3-methyl but-1-ene
  B) 2-methyl but-1-ene
  C) but-2-ene
  D) pent-2-ene
  Show Answer
  The correct answer is C .
• Question 132: The relatively high boiling points of alkanols are due to? Options:
  A) ionic bonding
  B) aromatic character
  C) covalent bonding
  D) hydrogen bonding
  Show Answer
  The correct answer is D .
• Question 133:

  Soaps clean surfaces on the principlebased on?

  Options:
  A) viscosity
  B) floatation
  C) elasticity
  D) surface tension
  Show Answer
  The correct answer is D .
• Question 134:

  What is the IUPAC name for the compound CCl${}_4$?

  Options:
  A) Tetrahydrochloride
  B) Tetrachloromethane
  C) Carbon tetrachloride
  D) Chloroform
  Show Answer
  The correct answer is B .
• Question 135: A given mass of gas occupies 2 dm³ at 300k. At what temperature will its volume be doubled keeping the pressure constant? Options:
  A) 400 k
  B) 480 k
  C) 550 k
  D) 600 k
  Show Answer
  The correct answer is D .
• Question 136: Which of the following statements is true about 2-methylpropane and butane Options:
  A) They have different number of carbon atoms
  B) They are members of same homologous series
  C) They have the same boiling points
  D) They have the same chemical properties
  Show Answer
  The correct answer is D .
• Question 137: A substance that is used as a ripening agent for fruits is Options:
  A) ethene
  B) propene
  C) methane
  D) butane
  Show Answer
  The correct answer is A .
• Question 138: Commercial bleaching can be carried out using Options:
  A) sulphur (IV) oxide and ammonia
  B) hydrogen sulphide and chlorine
  C) chlorine and sulphur (IV) oxide
  D) ammonia and chlorine
  Show Answer
  The correct answer is C .
• Question 139: Which of the following is NOT involved in the extraction of metals from their ores? Options:
  A) reduction with carbon
  B) reduction with other metals
  C) reduction by electrolysis
  D) oxidation with oxidizing agents
  Show Answer
  The correct answer is D .
• Question 140: An example of an acidic oxide is Options:
  A) NO
  B) CO
  C) SO₂
  D) CuO
  Show Answer
  The correct answer is C .