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 1101:

  

  Which of the following compounds is a secondary alkanol?

  Options:
  A) A
  B) B
  C) C
  D) D
  Show Answer
  The correct answer is A .
• Question 1102: Calculate the quantity of electricity in coulombs required to liberate 10g of copper from a copper compound[Cu=64, F = 96500 Cmol^-1] Options:
  A) 32395.5
  B) 30156.3
  C) 60784.5
  D) 15196.5
  Show Answer
  The correct answer is B .
• Question 1103: In what way is equilibrium constant for the forward reaction related to that of the reversed reaction? Options:
  A) The additional of the two is expected to be one
  B) The product of the two is expected to be one
  C) The two equilibrium constants are identical
  D) The product of the two is always greater than one
  Show Answer
  The correct answer is A .
• Question 1104: A hydrogen atom which has lost an electron contains Options:
  A) one proton only
  B) one neutron only
  C) one proton and one neutron
  D) one proton, one electron and one neutron
  Show Answer
  The correct answer is A .
• Question 1105: Ethene is prepared industrially by Options:
  A) Reforming
  B) Polymerization
  C) Distillation
  D) Cracking
  Show Answer
  The correct answer is D .
• Question 1106: The property which makes alcohol soluble in water is the Options:
  A) boiling point
  B) hydrogen bonding
  C) ionic character
  D) covalent nature
  Show Answer
  The correct answer is B .
• Question 1107: A certain industrial process is represented by the chemical equation 2A_(g) + B_(g) $\to$ C_(g) + 3D_(g) $\mathrm{\Delta }$H = X kJmol^-1. Which of the following conditions will favour the yield of the products? Options:
  A) increase in temperature, decrease in pressure
  B) increase in temperature, increase in pressure
  C) decrease in temperature,increase in pressure
  D) decrease in temperature, decrease in pressure
  E) constant in temperature, increase in pressure
  Show Answer
  The correct answer is A .
• Question 1108:

  The compounds made up of only carbon and hydrogen are called?

  Options:
  A) Carbon compounds
  B) Hydrocarbons
  C) Atoms
  D) Carbon hydrolysis
  Show Answer
  The correct answer is B .
• Question 1109: Safety matches contain sulphur and? Options:
  A) potassium trioxochlorate (V)
  B) potassium trioxonitrate (V)
  C) charcoal
  D) phosphorus sulphide
  Show Answer
  The correct answer is D .
• Question 1110: A certain volume of gas at 298k is heated such that its volume and pressure are now four times the original values. What is the new temperature? Options:
  A) 18.6k
  B) 100.0k
  C) 298.0k
  D) 1192.0k
  E) 4768.0k
  Show Answer
  The correct answer is E .