Reversible Reactions & Equilibria Quiz
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5 questions, one answer each
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1. What symbol shows a reaction is reversible?
- A. →
- B. ⇌
- C. =
- D.
2. What colour change occurs when white anhydrous copper(II) sulfate has water added to it?
- A. It turns blue
- B. It turns white
- C. It turns green
- D. It stays white
3. What is true at dynamic equilibrium in a sealed container?
- A. The forward reaction has stopped
- B. The reverse reaction has stopped
- C. The forward and reverse reactions occur at the same rate and concentrations stay constant
- D. The amounts of reactants and products must be exactly equal
4. Why does a catalyst not change the position of equilibrium?
- A. It only speeds up the forward reaction
- B. It only speeds up the reverse reaction
- C. It speeds up the forward and reverse reactions by the same amount
- D. It has no effect on reaction rate at all
5. A reversible gas reaction at equilibrium has 2 gas molecules of reactant forming 4 gas molecules of product. What happens to the position of equilibrium if pressure is increased?
- A. It shifts towards the reactants, as they occupy fewer gas molecules
- B. It shifts towards the products, as they occupy more gas molecules
- C. No shift occurs because pressure does not affect equilibrium
- D. It shifts to favour whichever side is exothermic