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 1331:

  

  The compound above contains

  Options:
  A) Sp ³ hybridized carbon atoms only
  B) Sp ² hybridized carbon atoms only
  C) Sp ³ and Sp hybirdized carbon atoms
  D) Sp ³ and Sp ²
  Show Answer
  The correct answer is D .
• Question 1332: Which of these solutions will give a white precipitate with a solution of barium chloride acidified with hydrochloric acid? Options:
  A) Sodium trioxocarbonate (IV)
  B) Sodium tetraoxosulphate (IV)
  C) Sodium trioxosulphate (IV)
  D) Sodium sulphide
  Show Answer
  The correct answer is A .
• Question 1333: Which of the following compounds will form a solution if exposed to air? Options:
  A) Na₂CO₃.10H₂O
  B) NaNO₃
  C) CuSO₄
  D) CaCl₂
  E) Na₂SO₄.10H₂O
  Show Answer
  The correct answer is D .
• Question 1334:

  

  2-methylbut-2-ene has the structure

  Options:
  A) A
  B) B
  C) C
  D) D
  Show Answer
  The correct answer is D .
• Question 1335: Oxidation is the process of? Options:
  A) gain of electrons
  B) loss of electrons
  C) gain of hydrogen
  D) loss of oxygen
  E) addition of an electropositive element to a substance
  Show Answer
  The correct answer is B .
• Question 1336:

  

  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 1337: A solid begins to melt when? Options:
  A) constituent particles acquires a greater kinetic energy
  B) energy of vibration of particles of the solid is less than the intermolecular forces
  C) constituent particles acquires energy above the average kinetic energy
  D) energy of vibration of particles of the solid equals the intermolecular forces
  Show Answer
  The correct answer is A .
• Question 1338:

  In the reaction N₂(g) + O(g) ↔ 2NO(g) produced an increase in the total pressure will?

  Options:
  A) cause less nitrogen to be produced in the equilibrium mixture
  B) cause less nitric oxide to be produced in the equilibrium mixture
  C) cause more nitric oxide to be produced in the equilibrium mixture
  D) cause more oxygen to be produced in the equilibrium mixture
  E) have no effect
  Show Answer
  The correct answer is E .
• Question 1339: Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the Options:
  A) decrease in nuclear charge
  B) increase in nuclear charge
  C) decrease in screening effect
  D) increase in screening effect
  Show Answer
  The correct answer is B .
• Question 1340: If the cost of electricity required to deposit 1 g of magnesium is ₦5.00, how much would it cost to deposit 10g of aluminium? Options:
  A) ₦10.00
  B) ₦27.00
  C) ₦44.44
  D) ₦66.67
  E) ₦33.33
  Show Answer
  The correct answer is D .