EASY x1
AVERAGE x2
DIFFICULT x3
CHALLENGE x4
SUPER x5
1
Which equation represents the neutralisation of nitric acid using potassium hydroxide?
A KOH(aq) + HNO₃(aq) → KNO₃(aq) + H₂O(l)
B KOH(aq) + HNO₃(aq) → KNO₃(l) + H₂O(l)
C KOH(l) + HNO₃(l) → KNO₃(l) + H₂O(aq)
D KOH(l) + HNO₃(l) → KNO₃(l) + H₂O(l)
A KOH(aq) + HNO₃(aq) → KNO₃(aq) + H₂O(l)
1
Excess aqueous sodium hydroxide is added to hydrochloric acid containing thymolphthalein.
Which colour change is observed?
______ to________
colourless to blue
1
Brass is a mixture of copper and zinc.
Describe and explain the relative strength of brass compared to copper.
Brass is stronger than copper because the layers of atoms in brass cannot easily slide over each other.
1
___________ is formed when iron (III) oxide is heated with carbon.
iron
1
The equation for the decomposition of hydrogen peroxide is shown.
2H2O2 → 2H2O + O2
The reaction is exothermic.
When a small amount of a catalyst is added, the oxygen is produced more quickly.
Which statement about the catalyst is correct?
A The catalyst makes the reaction more exothermic.
B The mass of the catalyst is the same before and after the reaction.
C The catalyst increases the final volume of oxygen produced.
D All of the catalyst is used up in the reaction.
B The mass of the catalyst is the same before and after the reaction.
2
What colour is observed when thymolphthalein is added to dilute HCl?
colourless
2
Aqueous sodium hydroxide is reacted with excess dilute hydrochloric acid.
Which ions cause the resulting mixture to be acidic?
H+ ions
2
What is the definition of a strong acid?
A a proton acceptor that is completely dissociated in aqueous solution
B a proton acceptor that is partially dissociated in aqueous solution
C a proton donor that is completely dissociated in aqueous solution
D a proton donor that is partially dissociated in aqueous solution
C. a proton donor that is completely dissociated in aqueous solution
2
Magnesium reacts with dilute hydrochloric acid.
Which gas is given off in this reaction?
hydrogen
2
Dilute aqueous sodium chloride is electrolysed using platinum electrodes.
What is the half-equation for the reaction at the cathode?
2H+ + 2e– → H2
3
When chlorine gas is bubbled into aqueous sodium bromide, a displacement reaction occurs.
Complete the description of this reaction:
___________ displaces _____________.
Chlorine displaced bromide ions.
3
Three different solutions are separately tested with blue litmus and with methyl orange (m.o.).
Each solution is known to be either acidic or alkaline.
Solution 1 - blue to blue litmus ; orange to yellow m.o.
Solution 2 - blue to red litmus ; orange to red m.o.
Solution 3 - blue to red litmus ; orange to orange m.o.
Which solution(s) is(are) acidic?
Solution 2
3
Which substances in the air are needed for iron to rust?
water and oxygen
3
Part of the reactivity series is shown.
potassium
X
calcium
Y
aluminium
Which metal is represented by Y?
MAGNESIUM, SILVER, ZINC OR COPPER?
Magnesium
3
Molten barium bromide is electrolysed using inert electrodes.
Which column identifies the product at each electrode?
anode -
cathode -
anode - bromine
cathode - barium
4
What colour is observed when methyl orange is added to aqueous sodium hydroxide?
yellow
4
Show the electronic (atomic) structure of neon, a noble gas.
4
Complete:
_____________ is an important ore of aluminium.
Bauxite
4
Describe one chemical property of a transition element.
forms coloured compounds,
acts as a catalyst
4
Concentrated aqueous copper (II) chloride is electrolysed using carbon electrodes.
What product is formed at each electrode?
anode -
cathode -
anode - chlorine
cathode - copper
5
Tennessine (atomic number 117) is a manufactured element that is below astatine in Group VII of the Periodic Table.
What is the expected state and colour of tennessine at room temperature and pressure?
A a diatomic, colourless gas
B a red-brown liquid
C a monatomic, green gas
D a black solid
D
5
Zinc is used to galvanise iron to prevent it from rusting.
Which statements are correct?
1 Galvanising is an example of a barrier method.
2 If the zinc is scratched, the iron will rust very quickly.
3 Galvanising is an example of sacrificial protection.
4 Zinc is more reactive than iron, and so it accepts electrons more readily.
1 and 3
5
Two acids, X and Y, with the same concentration and volume, are reacted separately with the same mass of magnesium ribbon. The reactions produce the same total volume of hydrogen gas, but acid Y reacts much more slowly than acid P.
The explanation for the difference between X and Y is:
Acid Y is ______1________ dissociated, and acid X is ______2_______ dissociated.
CHOOSE: Partially Fully (completely)
1 - partially,
2 - fully (completely)
5
A reaction occurs when lithium is dropped into water.
Describe lithium's density and the pH value of the solution made.
density - low;
pH value - above 7
5
Which reaction shows the italicised substance being reduced?
1 CuO + H2 → Cu + H2O
2 2Mg + O2 → 2MgO
3 MgO + 2HCl → MgCl2 + H2O
1 CuO + H2 → Cu + H2O