Zinc is extracted from zinc oxide by reduction.
Which element acts a reducing agent during this process?
Hydrogen
Oxygen
Carbon
Zinc
Did this page help you?
Zinc is extracted from zinc oxide by reduction.
Which element acts a reducing agent during this process?
Hydrogen
Oxygen
Carbon
Zinc
Did this page help you?
A displacement reaction occurs between magnesium and copper(II) sulfate.
What is the correct ionic equation for this reaction?
Mg (s) + Cu2+ (aq) → Mg2+ (aq) + Cu (s)
Mg (s) + Cu2+ (aq) + SO42- (aq) → Mg2+ (aq) + Cu (s) + SO42- (aq)
Mg2+ (aq) + Cu (s) → Mg (s) + Cu2+ (aq)
Mg (aq) + Cu2+ (aq) → Mg2+ (aq) + Cu (aq)
Did this page help you?
A student observed the reaction between copper(II) sulfate solution and zinc.
Which observations are correct for this reaction?
Observation 1 | Observation 2 | |
A | solution colour stays the same | pale grey crystals forming |
B | solution turns darker blue | grey residue on the metal |
C | solution turns orange/brown | blue crystals form on the metal |
D | solution turns paler blue | orange/ brown residue on the metal |
Did this page help you?
Zinc reacts with hydrochloric acid.
Which statement is not true for this reaction?
A burning splint gives a squeaky pop sound
It is a redox reaction
The reaction is less vigorous than that of iron and hydrochloric acid
A salt is formed
Did this page help you?
A reaction took place between iron sulfate and magnesium.
iron(II) sulfate + magnesium → magnesium sulfate + iron
Which species has been oxidised?
Iron
Magnesium
Sulfur
None of the above
Did this page help you?
Which of the following metals can not be extracted from its ore by reduction?
Iron
Zinc
Copper
Lithium
Did this page help you?
A student was investigating the reactivity of different metals in hydrochloric acid.
What must the student keep constant in this investigation to make it a fair experiment?
Control variable 1 | Control variable 2 | |
A | mass of metal | concentration of acid |
B | volume of acid | length of metal |
C | size of metal | temperature of acid |
D | temperature of the room | type of acid |
Did this page help you?
Some metals are unreactive and exist on their own in the earth.
What are these metals known as?
Transition Metals
Native metals
Alkali Metals
Alkaline earth metals
Did this page help you?