WorksheetsBRAIN BUSTER CHAPTER 7 RATE OF REACTION
Total questions: 20
Worksheet time: 20mins
[Kedah2023-04]
Which unit is used for the rate of reaction ?
A. g mol-1
B. g min-1
C. mol dm-3
D. kJmol-1
[Selangor2023 Set 1-04]
Which of the following is an example of a reaction with high rate?
A. Explosion of firecrackers
B. Photosynthesis of green plants
C. Digestion of food
D. The decomposition of animal carcasses
[Pahang 2023-21]
What is meant by rate of reaction based on the reaction between magnesium ribbon and 50cm3 of 0.5 mol dm-3 nitric acid?
A. Decreasing in volume of nitric acid per unit time
B. Increasing in volume of hydrogen gas per unit time
C. Increasing in concentration of nitric acid per unit time
D. Increasing in mass of magnesium ribbon per unit time
[Negeri Sembilan 2023-10]
Which of the following is the correct method to calculate the rate of reaction at third seconds?
A.
B.
C.
D.
[Putrajaya2023-36]
Diagram shows the curve if changes in mass of calcium carbonate against time for the reaction between calcium carbonate and hydrochloric acid. What is overall rate of reaction for the reaction?
A. 0.033 g s-1
B. 0.028 g s-1
C. 0.022 g s-1
D. 0.006 g s-1
[Selangor2023 Set 1-30]
Table 3 shows the results obtained to determine the rate of reaction. What is the average rate of reaction from 60s to 150s ?
A. 0.110 cm³ s⁻¹
B. 0.133 cm³ s⁻¹
C. 0.220 cm³ s⁻¹
D. 0.343 cm³ s⁻¹
[Pahang JUJ Set 1 2023-07]
What is the meaning of the rate of reaction?
A. Decrease in quantity of product
B. Increase in quantity of product per unit time
C. Decrease in quantity of product against time
D. Increase in quantity of reactant per unit time
[Selangor 2023 Set 1-31]
A student added 2.0 g of zinc strip into a beaker of excess sulphuric acid. After 30 s, the mass of zinc left is 1.35 g. What is the overall average rate of reaction?
[Relative atomic mass of Zn = 65]
A. 0.020 mol min⁻¹
B. 0.042 mol min⁻¹
C. 0.062 mol min⁻¹
D. 0.103 mol min⁻¹
[Kelantan 2023-32]
Table shows the total volume of oxygen gas collected in the decomposition reaction of hydrogen peroxide.
A. 0.458 cm3 s–1
B. 0.354 cm3 s–1
C. 0.278 cm3 s–1
D. 0.250 cm3 s–1
[Melaka 2023-21]
Table shows the volume of carbon dioxide gas produced in the reaction between granule of calcium carbonate and hydrochloric acid. If the average rate of reaction in the fourth minute is 0.0625 cm3 s–1. Calculate the value of x.
A. 39.50
B. 39.85
C. 40.10
D. 40.75
[MRSM 2023-22]
Dilute nitric acid reacts faster with zinc powder compared to zinc strip.
Which of the following explains this statement ?
A. There is a layer of zinc oxide on the zinc strip
B. The zinc powder has a larger total surface area
C. The particles in the zinc strip are packed closely
D. The particles of zinc powder have higher kinetic energy
[Johor Bahru 2023-30]
Diagram shows curve I obtained when 1.0 g calcium carbonate chips reacts with excess sulphuric acid at 50°C. Which of the following will produce curve II ?
A. Using 2.0 g of calcium carbonate chips
B. Using 1.0 g of calcium carbonate powder
C. Adding distilled water to the sulphuric acid
D. Decreasing the temperature of sulphuric acid to 30°C
[Putrajaya 2023-23]
Diagram shows the energy profile of a reaction. Ea is the activation energy for this reaction. What will change the activation energy from Ea to Ea' ?
A. Size
B. Temperature
C. Concentration
D. Catalyst
[Kedah 2023-27]
When a few drops of copper (II) sulphate solution added to a mixture of zinc powder and dilute sulphuric acid, the rate of reaction increases. Which statement explains why the rate of reaction increases ?
A. Lower the activation energy
B. Increases the collision frequency
C. Increases the concentration of sulphate ion in the mixture
D. Make the orientation of collision between the reacting particles more suitable
[Selangor 2023 Set 01-22]
Diagram shows the decomposition of hydrogen peroxide.
What should be done to increase the rate of decomposition of hydrogen peroxide ?
A. Add water
B. Use smaller conical flask
C. Increase the concentration of hydrogen peroxide
D. Remove manganese (IV) oxide
[Pahang JUJ Set 1 2023-21]
Diagram shows meat A and meat B in two different sizes.
Meat B is cooked faster because it has ............
A. Lower mass
B. Lower density
C. Lower heat capacity
D. Bigger total surface area
[Pahang 2023-07]
Which statement best explains the meaning of effective collision?
A. Collisions that occur at high temperatures
B. Collisions that causes a chemical reaction to occur
C. Collisions that causes the formation of new bonds
D. Collisions occur when reactant particles collide with each other in the correct orientation
[Kedah 2023-39]
Diagram shows the graph in experiment I that are using 5 g of calcium carbonate powder, CaCO3 and 50 cm3 of 1.0 mol dm-3 of nitric acid, HNO3 to produce carbon dioxide gas, CO2. Which of the following reaction will produce graph II ?
A. 5g of calcium carbonate powder, CaCO3 + 50 cm3 of 2.0 mol dm-3 of nitric acid, HNO3
A. 5g of calcium carbonate powder, CaCO3 + 100 cm3 of 1.0 mol dm-3 of nitric acid, HNO3
A. 5g of calcium carbonate chips, CaCO3 + 100 cm3 of 1.0 mol dm-3 of nitric acid, HNO3
A. 5g of calcium carbonate chips, CaCO3 + 50 cm3 of 1.0 mol dm-3 of nitric acid, HNO3
[MRSM 2023-06]
The following chemical equation shows a reaction between magnesium and sulphuric acid.
Which of the following statement is true about CuSO4 in the reaction?
A. Its chemical properties change
B. Increase the quantity of product
C. Alter the rate of reaction
D. Mass of CuSO4 decreases at the end of the reaction
[Johor Bahru 2023-07]
Which of the following factors can affect the rate of reaction?
I. Volume of the reactants
II. Concentration of the reactants
III. Presence of catalyst
IV. Mass of the reactants
A. I and II
B. I and IV
C. II and III
D. III and IV
