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