Exam code: 5070
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 |
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A student was investigating the reactivity of four different metals, W, X, Y and Z, in hydrochloric acid.
Which is the most reactive metal and which is the least reactive metal?
| Most reactive metal | Least reactive metal |
A | W | X |
B | X | W |
C | Y | X |
D | W | Z |
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Compound Y is thermally decomposed with carbon using the apparatus below:
A brown solid is formed in the reaction tube and the limewater turns cloudy.
What is compound Y?
Copper (II) oxide
Calcium oxide
Magnesium oxide
Sodium oxide
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Calcium, copper, iron and magnesium are metals. They can be placed in order of reactivity.
Which of the following statements about these metals is correct?
Iron reacts with steam but magnesium does not.
Copper reacts with dilute hydrochloric acid to form copper (II) chloride.
Magnesium and calcium both react with hot water.
Iron (II) oxide cannot be reduced by heating strongly with carbon.
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Which row in the table below shows how the metal will react?
| metal | reacts with dilute acid | reacts rapidly with cold water | reacts with steam |
A | copper |
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B | calcium |
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C | zinc |
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D | magnesium |
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Q, R and S are metals.
Metal | Reacts with cold water | Reacts with steam | Reacts with dilute hydrochloric acid |
Q | yes | yes | violently |
R | very slowly | slowly | less strongly |
S | no | no | no |
What are the possible identities of the metals Q, R and S?
| Q | R | S |
A | Potassium | Iron | Magnesium |
B | Sodium | Zinc | Copper |
C | Silver | Aluminium | Iron |
D | Calcium | Copper | Gold |
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A student was investigating the reactivity of different metals in hydrochloric acid.
The diagrams show what happens when each metal was added to dilute hydrochloric acid.
What are W, X, Y and Z?
| W | X | Y | Z |
A | Calcium | Copper | Magnesium | Zinc |
B | Copper | Zinc | Calcium | Magnesium |
C | Magnesium | Calcium | Zinc | Copper |
D | Zinc | Magneisum | Copper | Calcium |
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Reactions of three metals and their oxides are shown in the table.
metal | reacts with cold water | metal oxide reacts with carbon |
P | no | no |
Q | no | yes |
R | yes | no |
What is the order of reactivity of the metals?
| Least reactive | → | Most reactive |
A | P | Q | R |
B | Q | P | R |
C | Q | R | P |
D | R | P | Q |
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Five different metals P, Q, R, S and T were reacted with dilute hydrochloric acid.
The volume of hydrogen gas produced after one minute was measured. The results are shown in the bar chart below:
What is the order of reactivity of the metals?
| most reactive | → | → | → | least reactive |
A | P | Q | R | S | T |
B | R | P | S | Q | T |
C | T | Q | S | P | R |
D | T | S | R | Q | P |
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The following section of the reactivity series shows a newly discovered element, Y. The only oxide of Y has the formula YO.
Ca
Mg
Fe
Y
H
Cu
Which of the equations shows a reaction which would take place?
2 Y(s) + Cu2+(aq) → 2 Y+(aq) + Cu(s)
Y(s) + Fe2O3(s) → 2 Fe(s) + 3 YO(s)
Y(s) + 2 HCl (aq) → YCl2(aq) + H2(g)
Cu(s) + Y2+(aq) → Cu2+(aq) + Y(s)
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Four different metals P, Q, R and S were added to different aqueous solutions of their ions.
The results are shown in the table below.
Metal | P2+ | Q2+ | R2+ | S2+ |
P | ✗ | ✗ | ✓ | ✓ |
Q | ✓ | ✗ | ✓ | ✓ |
R | ✗ | ✗ | ✗ | ✗ |
S | ✗ | ✗ | ✓ | ✗ |
Key: ✗ = no reaction, ✓ = reaction
What is the order of reactivity of the metals from most reactive to least reactive?
| most reactive | → | → | least reactive |
A | Q | P | S | R |
B | Q | S | P | R |
C | R | P | S | Q |
D | R | S | P | Q |
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