WorksheetsROR7.2
Total questions: 30
Worksheet time: 30mins
The ____________ states that atoms, ions, or molecules must collide in order to react.
transition state
activation energy
rate law
collision theory
Increasing the ____ causes the particles (atoms
or molecules) of the reactants to move more quickly so that
they collide with each other more frequently and with more
energy.
Catalyst
Surface Area
Temperature
Concentration
________ is the measure of how much area of an
object is exposed.
Surface Area
Catalyst
Temperature
Concentration
Pick the TWO (2) options that will INCREASE the rate of a reaction.
Reducing Heat
Adding Catalyst
Adding Heat
Removing Catalyst
Which of the following will lower the rate
of reaction?
adding an enzyme to the reaction
decreasing the temperature from 40°C to
10°C
breaking a chunk of calcium up into
smaller pieces
increasing the amount of solute
dissolved in a solution
Which factor can only affects the rate of reaction when involved gases as the reactant?
Concentration of reactants
Pressure
Temperature
Size of reactants
Which of the following statement is correct?
Smaller size of reactants, smaller total surface area, higher reaction rate
Larger size of reactants, smaller total surface area, higher reaction rate
Smaller size of reactants, larger total surface area, higher reaction rate
Larger size of reactants, larger total surface area, higher reaction rate
_____________ concentration of reactants by adding solute; ______________ concentration of reactants by adding solvent.
Increase; Increase
Decrease; Decrease
Increase; Decrease
Decrease; Increase
Does the presence of catalyst will change the amount of product?
Yes
No
Which of the following can increase the rate of reaction?
(More than 1 option)
Decrease the size of reactants
Increase the temperature
Presence of inhibitors
Increase the concentration of reactants
Increase the pressure
List four factors that affects the rate of a reaction
temperature
concentration
surface area
volume
catalysts
Why does a higher concentration increase the rate of reaction?
it increases the amount of reactants
it lowers the activation energy
it increases the energy of particle collisions
it increases the frequency of particle collisions
In the reaction hydrochloric acid and zinc, which of the factors does not affect rate of reaction?
Concentration of hydrochloric acid
Temperature hydrochloric acid
Pressure of reaction
Presence of the catalyst copper(II) sulphate
Based on the collision theory which statement is correct about the effect of small size reactant?
Concentration of particles of reactant is higher
Total surface area of reactant is bigger
Activation energy of reactant is lower
Kinetic energy of the reactant is higher
The rate of reaction increases when a little copper(II) sulphate solution is added to a mixture of magnesium powder and dilute nitric acid. Which statement explains why the rate of reaction increase?
The total surface area of the reactant particles increases
Kinetic energy of the reactant is higher
Activation energy of reactant is lower
The total number of reactant particles per unit volume
increases
Decomposition of hydrogen peroxide produce oxygen gas . What is the effect to the decomposition of hydrogen peroxide if it is heated to a higher temperature?
Total volume of oxygen decrease
More heat is released.
Initial rate of decomposition of hydrogen peroxide increase
Concentration of hydrogen peroxide increase
The higher the temperature of a reactant, the higher the rate of reaction. Which statement can explain why the rate of reaction is higher?
The reacting particles always collide with one another.
The reacting particles are able to overcome the activation energy.
Zarah-zarah bahan tindak balas mempunyai tenaga kinetik yang lebih tinggi.
The reacting particles have bigger total surface area.
Which reaction is the fastest?
1 g limestone powder, 100 cm3 of 1 mol dm-3 acid and 30oC
1 g limestone solid, 100 cm3 of 1 mol dm-3 acid and 40oC
1 g limestone powder, 100 cm3 acid of 1 mol dm-3 and 40oC.
The decomposition of hydrogen peroxide is accelerated by adding a small amount of catalyst.
Which of these graphs shows the mass of the catalyst as the reaction takes place?
Marble chips react with hydrochloric acid to produce carbon dioxide. The equation for the reaction is as follows :
CaCO3 + 2HCl → CaCl2 + H2O + CO2 Which of the following will lower the rate of the reaction?
Use more dilute hydrochloric acid
Use smaller sized marble chips
Use a larger volume of hydrochloric acid
Use marble chips that have a larger surface area
Amri wants to make sugar syrup quickly. Which of the following factors, does he need to pay attention to?
Temperature of water
Mass of sugar
Volume of water
Which of the following is incorrect about catalyst?
Biological catalysts are called enzymes
Catalysts do not appear in the balanced equation
Catalysts increase the activation energy for a reaction
Only a small amount of catalyst is required to accelerate a reaction
