JAMB CHEMISTRY PRACTISE QUESTIONS - IV

Hardness of water is mainly due to the presence of

• calcium hydroxide or magnesium hydroxide
• calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI)
• sodium hydroxide or magnesium Hydroxide
• calcium chloride or sodium chloride salts

A suitable solvent for iodine and naphthalene is

• carbon (IV) sulphide
• water
• benzene
• ethanol

Which of the following noble gases is commonly found in the atmosphere?

• Xenon
• Neon
• Helium
• Argon

N₂O₄(g) ⇋ 2NO₂(g) ΔH = +ve In the reaction above, an increase in temperature will

• increase the value of the equilibrium constant
• decreases the value of the equilibrium constant
• increase in the reactant production
• shift the equilibrium to the left

CH₃COOH(aq) + OH-(aq) ⇋ CH₃COO-(aq) + H₂O(l) In the reaction above, CH₃COO- (aq) is

• conjugate base
• acid
• base
• conjugate acid

How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?

• 3
• 4
• 1
• 2

Which of the following is NOT an alkali?

• NH₃
• Mg(OH)₂
• Ca(OH)₂
• NaOH

An effect of thermal pollution on water bodies is that the

• volume of water reduces
• volume of chemical waste increase
• level of oxides of nitrogen increase
• level of oxygen reduces

Which of the following is a deliquescent compound?

• Na₂CO₃
• CaCl₂
• Na₂CO₃.10H₂O
• CuO

A chemical reaction which the hydration energy is greater than the lattice energy is referred to as

• a spontaneous reaction
• an endothermic reaction
• an exothermic reaction
• a reversible reaction