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دسویں جماعت · کیمیا · 5 سوالات

نام: ____________________ تاریخ: ____________

A reaction that can go in both directions is called:
- A Irreversible
- B Reversible
- C Slow
- D Explosive
At equilibrium, the rates of the forward and backward reactions are:
- A Different
- B Zero
- C Infinite
- D Equal
In the Haber process, the product is:
- A Ammonia
- B Methane
- C Nitric acid
- D Sulphuric acid
Increasing the pressure on N2 + 3H2 giving 2NH3 shifts the equilibrium:
- A To the left
- B To the right
- C It stops
- D It does not shift
A catalyst in an equilibrium reaction:
- A Changes the equilibrium position
- B Speeds up reaching equilibrium
- C Increases the yield
- D Is used up

جوابی کلید

1. B, 2. D, 3. A, 4. B, 5. B

A reversible reaction can proceed forwards and backwards.
Chemical equilibrium is dynamic: the two rates are equal.
Nitrogen and hydrogen combine to form ammonia.
The right side has fewer moles of gas (2 against 4), so more pressure favours it.
A catalyst makes equilibrium reached sooner but does not change the position.