Chemical Reactions
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Physical and chemical changes
SubtopicPhysical and chemical changes under Chemical Reactions for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which of the following is a physical change involving the removal of heat?
A.Boiling
B.Evaporating
C.Freezing
D.Sublimating
- 2.
Heating copper(II) carbonate causes it to turn from green to black as it releases carbon dioxide gas. This process is a:
A.Physical change
B.Chemical change
C.Melting process
D.Sublimation process
- 3.
In which of these scenarios is a physical change occurring?
A.A piece of fruit rotting
B.A car engine burning gasoline
C.A block of lead being hammered into a thin sheet
D.A copper roof turning green over many years
Download the worksheet for Chemical Reactions - Physical and chemical changes to practice offline. It includes additional chapter-level practice questions.
Rate of reaction (Concentration, Temperature, Surface area, Catalysts)
SubtopicRate of reaction (Concentration, Temperature, Surface area, Catalysts) under Chemical Reactions for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which change increases the number of particles in a given volume of solution?
A.Adding more solvent
B.Increasing the concentration
C.Increasing the temperature
D.Using a larger flask
- 2.
What does it mean if the line on a volume-time graph for a reaction becomes horizontal?
A.The reaction is at its fastest
B.The reaction has finished
C.The temperature is increasing
D.The catalyst is working well
- 3.
If you double the mass of a solid reactant but its surface area stays the same, how will the initial rate change?
A.It will double
B.It will stay the same
C.It will decrease
D.It will triple
Download the worksheet for Chemical Reactions - Rate of reaction (Concentration, Temperature, Surface area, Catalysts) to practice offline. It includes additional chapter-level practice questions.
Reversible reactions and dynamic equilibrium
SubtopicReversible reactions and dynamic equilibrium under Chemical Reactions for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
If the concentration of a reactant is decreased, in which direction will the equilibrium shift?
A.To the left
B.To the right
C.It will not shift
D.The reaction will explode
- 2.
What color is hydrated copper(II) sulfate?
A.Blue
B.White
C.Green
D.Yellow
- 3.
What is the purpose of using a catalyst in a reversible industrial process like the Contact process?
A.To reach equilibrium faster
B.To increase the total amount of product at equilibrium
C.To change the direction of the reaction
D.To stop the backward reaction from happening
Download the worksheet for Chemical Reactions - Reversible reactions and dynamic equilibrium to practice offline. It includes additional chapter-level practice questions.
Le Chatelier’s principle
SubtopicLe Chatelier’s principle under Chemical Reactions for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
If a reaction is at equilibrium and the temperature is increased, the system will shift to:
A.Absorb the extra heat
B.Release more heat
C.Decrease the pressure
D.Increase the concentration of all species
- 2.
A system at equilibrium is in a 'closed' container. What does this mean?
A.No heat can enter or leave
B.No matter can enter or leave
C.The pressure is always 1 atm
D.The container is transparent
- 3.
In a reversible reaction, if the forward reaction is exothermic, the reverse reaction must be:
A.Exothermic
B.Endothermic
C.At equilibrium
D.Faster
Download the worksheet for Chemical Reactions - Le Chatelier’s principle to practice offline. It includes additional chapter-level practice questions.
Redox reactions (Oxidation states and identifying agents)
SubtopicRedox reactions (Oxidation states and identifying agents) under Chemical Reactions for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
In a redox reaction, the total number of electrons lost must be:
A.Greater than electrons gained
B.Less than electrons gained
C.Equal to electrons gained
D.Zero
- 2.
What is the oxidation state of Oxygen in Hydrogen peroxide ()?
A.-2
B.0
C.-1
D.+1
- 3.
During the oxidation of a metal, the metal atom usually:
A.Gains electrons to form an anion
B.Loses electrons to form a cation
C.Gains protons
D.Shares electrons with another metal
Download the worksheet for Chemical Reactions - Redox reactions (Oxidation states and identifying agents) to practice offline. It includes additional chapter-level practice questions.