1) Which one of the following will not increase the rate of the above reaction?
A. decreasing the size of the solid copper particles
B. increasing the temperature of HNO₃ by 20 °C
C. increasing the concentration of HNO₃
D. allowing NO₂ gas to escape

Solution

2) In the above reaction, the number of successful collisions per second is a small fraction of the total number of collisions.
The major reason for this is that
A. the nitric acid is ionised in solution.
B. some reactant particles have too much kinetic energy.
C. the kinetic energy of the particles is reduced when they collide with the container's walls.
D. not all reactant particles have the minimum kinetic energy required to initiate the reaction.

Solution