Q.1
When a reversible reaction reaches equilibrium...
  • the reverse reaction is happening more quickly than the forward reaction
  • the forward reaction is happening more quickly than the reverse reaction
  • the forward reaction is happening at the same rate as the reverse reaction
  • the reverse reaction is happening slower than the forward reaction
Q.2
Pick the correct combination for how we represent reversible and irreversible reactions.
  • reversible ⇌ irreversible →
  • reversible ← irreversible →
  • reversible ⇌ irreversible ←
  • irreversible ⇌ reversible →
Q.3
Which of the following reactions is reversible?
  • Combustion
  • Neutralisation
  • The Haber process
  • Boiling an egg
Q.4
Which of the following reactions is irreversible?
  • Reaction between anhydrous copper sulfate and water
  • Decomposition of ammonium chloride
  • Reaction between sodium and water
  • Reaction between hydrogen and nitrogen
Q.5
If a reversible reaction is exothermic in the forward direction, it will be...
  • exothermic in the reverse direction
  • endothermic in the forward direction
  • endothermic in the reverse direction
  • not involve energy in the reverse direction
Q.6
A reversible reaction is...
  • a reaction that can proceed in both directions
  • a reaction that can only go in one direction
  • a reaction that can only go backwards
  • a reaction that does not happen
Q.7
Why is a reaction described as irreversible?
  • The products cannot be turned directly back into the reactants
  • You need to apply heat to make the reaction work
  • The products can be turned back into the reactants
  • The reactants cannot be turned into the products
Q.8
Which of the following is reversible?
  • Frying a potato
  • Melting an ice cube
  • Making toast
  • Baking a cake
Q.9
Which of the following equations is CORRECT?
  • Sugar ← water + carbon
  • Anhydrous copper sulfate → copper sulfate + water
  • Sodium hydrogencarbonate ⇌ sodium carbonate + carbon dioxide + water
  • Calcium carbonate → calcium oxide + carbon dioxide
Q.10
Which of the following equations is NOT correct?
  • CuCO3 → CuO + CO2
  • 2Mg + O2 → 2MgO
  • NH4Cl → NH3 + HCl
  • CH4 + 2O2 → CO2 + 2H2O
0 h : 0 m : 1 s