The Effect of Changing Pressure Quiz
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5 questions, one answer each
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1. Changing pressure affects the equilibrium position of which type of reversible reaction?
- A. Any reaction
- B. Reactions involving gases
- C. Reactions involving only solids
- D. Reactions involving only liquids
2. An increase in pressure favours the side of a gaseous equilibrium with...
- A. More gas molecules
- B. Fewer gas molecules
- C. Equal numbers of molecules always
- D. No molecules
3. For N2(g) + 3H2(g) ⇌ 2NH3(g), which direction does increasing pressure favour?
- A. The reverse direction
- B. The forward direction, because it has fewer gas molecules
- C. Neither direction, gas totals are equal
- D. It cannot be determined
4. A reversible gaseous reaction is 2X(g) ⇌ X2(g) + Y(g), where there are 2 moles of gas on both sides. What effect does increasing pressure have on the equilibrium position?
- A. Shifts it strongly to the right
- B. Shifts it strongly to the left
- C. No effect, since gas moles are equal on both sides
- D. Reverses the reaction completely
5. A chemist increases the pressure on a reaction where the forward direction produces 3 moles of gas from 1 mole of gas. What would you expect to happen to the yield of product?
- A. Yield of product increases
- B. Yield of product decreases, as equilibrium shifts towards the reactant side
- C. No change in yield
- D. The reaction becomes non-reversible