WorksheetsRate of reaction
Total questions: 10
Worksheet time: 13mins
In the diagram, which line/curve best represents the volume of hydrogen produced over time?
A
B
C
D
Which factor lowers the activation energy of a reaction?
Increase in concentration of the reactants
Increase in pressure
addition of a catalyst
Increase in temperature
The rate of reaction alters as the temperature rises because the particles:
Move further apart
Require less kinetic energy
Become larger
Gain more kinetic energy
Same mass of magnesium reacts with excess hydrochloric acids. Which solution gives the shortest total reaction time?
50 cm3 of cold 2.0 mol/dm3 hydrochloric acid
100 cm3 of hot 1.0 mol/dm3 hydrochloric acid
50 cm3 of hot 2.0 mol/dm3 hydrochloric acid
100 cm3 of cold 1.0 mol/dm3 hydrochloric acid
Which graph is correct in showing the rate of reaction for the following
0.2g manganese(IV) oxide act as a catalyst in the decomposition of 34g hydrogen peroxide to produce 1 mol of oxygen and 1 mol of hydrogen. At the end of the reaction, the manganese(IV) oxide left is (a) g.
Hydrochloric acid reacts with solid calcium carbonate. Which of the following does not affect the rate of the reaction
Temperature
Concentration of hydrochloric acid
Pressure
Surface area of calcium carbonate
Enzymes are protein molecules which catalyse biological reactions. Which of the following is not true about enzymes
Enzymes denature at extremely high temperature
Enzymes are inactive beyond their optimal temperature
Enzymes work best at their optimum pH
Enzymes remain chemically unchanged at the end of the reaction.
When a catalyst is added,
Line of activation energy shift to the left
Line of activation energy shift to the right
Curve shift to the right
Curve shift to the left
In Haber process, a moderately high temperature is set at 450 degree Celsius, this is because
Low temperature is expensive as the cost and maintenance of equipment used become higher
High temperature is expensive as the cost and maintenance of equipment used become higher
Rising the temperature favours the forward reaction and increases equilibrium yield of ammonia
Reaction is extremely slow at low temperature
