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 2001: How many protons, neutrons and electrons respectively are present in the element 60/27 Co? Options:
  A) 27, 33 and 33
  B) 33, 27 and 27
  C) 27, 33, and 27
  D) 60, 33 and 60
  Show Answer
  The correct answer is C .
• Question 2002: Terylene is synthesized from ethane- 1, 2-diol and benzene - 1, 4-dicarboxylic acid by? Options:
  A) addition reaction
  B) condensation reaction
  C) elimination reaction
  D) substitution reaction
  Show Answer
  The correct answer is B .
• Question 2003: When sodium reacts with water, the resulting solution is Options:
  A) Weakly acidic
  B) Neutral
  C) Acidic
  D) Alkaline
  Show Answer
  The correct answer is D .
• Question 2004:

  

  Use the table above to answer this question. The element that is likely to participate in covalent rather than ionic bonding is

  Options:
  A) Z
  B) Y
  C) X
  D) W
  Show Answer
  The correct answer is C .
• Question 2005: An example of aliphatic unsaturated hydrocarbon is Options:
  A) pentane
  B) butanol
  C) propene
  D) benzene
  Show Answer
  The correct answer is C .
• Question 2006:

  

  Use the diagram above to answer this question.

  Which of the following structural formula is NOT isomeric with the others?

  Options:
  A) A
  B) B
  C) C
  D) D
  E) E
  Show Answer
  The correct answer is D .
• Question 2007: Methanoic acid mixes with water in all proportions and has about the same boiling point as water which of the following methods would you adopt to obtain pure water from a mixture of stand, water and methanoic acid? Options:
  A) fractional distillation
  B) filtration followed by distillation
  C) neutralization with sodium hydroxide followed by distillation
  D) esterification with ethanol followed by distillation
  E) neutralization with sodium hydroxide followed by filtration
  Show Answer
  The correct answer is B .
• Question 2008: An element with atomic number twelve is likely to be Options:
  A) electrovalent with a velocity of 1
  B) electrovalent with a valency of 2
  C) covalent with a valency of 2
  D) covalent with valency of 4
  Show Answer
  The correct answer is B .
• Question 2009:

  X is a substance which liberates CO${}_2$ on treatment with concentrated H${}_2$SO${}_4$. A warm solution of X can decolorize acidified KMnO${}_4$. X is

  Options:
  A) HCOOH
  B) NaHCO${}_3$
  C) FeCO${}_3$
  D) H${}_2$C${}_2$O${}_4$
  Show Answer
  The correct answer is D .
• Question 2010:

  Diamond is a bad conductor of electricity because its bonding electrons are used in

  Options:
  A) crystal lattice formation
  B) covalent bond formation
  C) metallic bond formation
  D) coordinate bond formation
  Show Answer
  The correct answer is B .