Question
Acidified aqueous silver nitrate is added to a test-tube containing aqueous chloride ions.
The test-tube is then left in direct sunlight.
Which row describes the observations and explains what happens to the reaction mixture?
Answer/Explanation
Ans:
D
Question
The reaction used to manufacture ammonia from nitrogen and hydrogen is reversible. An equilibrium is established between ammonia, nitrogen and hydrogen. Which statement describes the equilibrium?
A. Both the forward reaction and the backward reaction have the same rate.
B. The rate of the backward reaction is greater than the rate of the forward reaction.
C. The rate of the forward reaction is greater than the rate of the backward reaction.
D. The forward and backward reactions have both stopped.
Answer/Explanation
Ans:
A
Question
Ammonia is made by reacting nitrogen with hydrogen in the Haber process.
The equation for the process is shown.
\(N_2 + 3H_2 \leftrightarrow 2NH_3\)
Which changes in reaction conditions would produce a greater yield of ammonia?
1 adding more iron catalyst
2 increasing the reaction pressure
3 increasing the particle size of the iron catalyst
A 1 only B 2 only C 1 and 2 D 2 and 3
Answer/Explanation
Ans: B
Question
Which statement about a reaction in equilibrium is correct?
A Both the forward and the backward reactions are proceeding at the same rate.
B Neither the forward nor the backward reaction is proceeding.
C The amount of product present is no longer affected by changes in temperature or pressure.
D The amount of product present is only affected by a change in pressure.
Answer/Explanation
Ans: A