The diagrams show particles in a container.
Which two diagrams show the process of evaporation?
- 1 → 2
- 1 → 3
- 2 → 3
- 3 → 1
Which piece of apparatus is used to measure exactly 26.3 cm3 of a liquid?
| W | X | Y | |
| melting point / °C | –114 | 115 | –101 |
| boiling point / °C | 78 | 445 | –34 |
The substances are chlorine, ethanol and sulfur. Which row identifies W, X and Y?
| W | X | Y | |
| A | chlorine | ethanol | sulfur |
| B | ethanol | sulfur | chlorine |
| C | sulfur | chlorine | ethanol |
| D | sulfur | ethanol | chlorine |
In which atom is the number of protons equal to the number of neutrons?
A 40Ar
B 19F
C 23Na
D 16O
Which row identifies an alloy, a pure metal and a non-metal?
Alloy | Pure metal | Non-metal | |
A B C D | brass brass copper copper | carbon copper brass carbon | copper carbon carbon brass |
A covalent molecule Q contains exactly six shared
What is Q?
- ammonia, NH3
- chlorine, Cl 2
- methane, CH4
- water, H2O
7 The ‘lead’ in a pencil is made of a mixture of graphite and clay.
When the percentage of graphite is increased, the pencil slides across the paper more easily. Which statement explains this observation?
A Graphite has a high melting point.
B Graphite is a form of carbon.
C Graphite is a lubricant.
D Graphite is a non-metal.
The equation for the reaction between magnesium and dilute sulfuric acid is
Mg + H2SO4 → MgSO4 + H2
Which mass of magnesium sulfate is formed when 12 g of magnesium completely reacts with dilute sulfuric acid?
[The Mr of MgSO4 is 120]
A 5 g
B 10 g
C 60 g
D 120 g
What is observed at each electrode when molten lead(II) bromide is electrolysed using platinum electrodes?
| Negative Electrode | Positive Electrode |
A. | bubbles of a colourless gas | bubbles of a brown gas |
B. | bubbles of a colourless gas | bubbles of a colourless gas |
C. | shiny grey liquid | bubbles of a brown gas |
D. | shiny grey liquid | bubbles of a colourless gas |
Which gas is used as a fuel?
A. argon
B. hydrogen
C. nitrogen
D. oxygen
Burning fuels is an exothermic reaction.
What is meant by the term exothermic?
A. A gas is produced.
B. Energy is released.
C. Heat is absorbed.
D. The mass of the fuel decreases.
The diagram shows a rate of reaction experiment.
Increasing the concentration of the acid and increasing the temperature both affect the rate of reaction.
Which row is correct?
| Increase the Concentration Of Acid | Increase the Temperature |
A. | decrease rate of reaction | decrease rate of reaction |
B. | decrease rate of reaction | increase rate of reaction |
C. | increase rate of reaction | decrease rate of reaction |
D. | increase rate of reaction | increase rate of reaction |
Water is added to anhydrous copper(II)
What happens during the reaction?
A The copper(II) sulfate turns blue and the solution formed gets colder.
B The copper(II) sulfate turns blue and the solution formed gets hotter.
C The copper(II) sulfate turns white and the solution formed gets colder.
D The copper(II) sulfate turns white and the solution formed gets hotter.
Which equation shows an oxidation reaction?
- C + O2 → CO2
- CaCO3 → CaO + CO2
- CaO + 2HCl → CaCl 2 + H2O
- N2O4 → 2NO2
Dilute nitric acid is added to a solid,
A gas, G, is produced which is denser than air and extinguishes a burning splint. What are F and G?
| Solid F | Gas G |
A B C D | calcium calcium carbonate calcium hydroxide calcium oxide | hydrogen carbon dioxide hydrogen carbon dioxide |
Which statement about oxides is correct?
A. A solution of magnesium oxide has a pH less than pH 7.
B. A solution of sulfur dioxide has a pH greater than pH 7.
C. Magnesium oxide reacts with nitric acid to make a salt.
D. Sulfur dioxide reacts with hydrochloric acid to make a salt.
Which methods are suitable for preparing both zinc sulfate and copper(II) sulfate?
1. reacting the metal oxide with warm dilute aqueous sulfuric acid
2. reacting the metal with dilute aqueous sulfuric acid
3. reacting the metal carbonate with dilute aqueous sulfuric acid
A 1, 2 and 3
B 1 and 2 only
C 1 and 3 only
D 2 and 3 only
Two salt solutions, X and Y, are
The table shows the results.
test | X | Y |
a few drops of aqueous sodium hydroxide are added | green precipitate formed | red-brown precipitate formed |
a few drops of dilute nitric acid and a few drops of barium nitrate are added | no change is seen | white precipitate formed |
a few drops of dilute nitric acid and a few drops of silver nitrate are added | white precipitate formed | no change seen |
What are X and Y?
| X | Y |
A B C D | iron(II) chloride iron(III) chloride iron(II) sulfate iron(III) sulfate | iron(III) sulfate iron(III) sulfate iron(III) chloride iron(III) chloride |
Which element is in the same period of the Periodic Table as silicon?
A. germanium
B. scandium
C. sodium
D. strontium
Which statement about the halogens is correct?
A. A sample of bromine reacts with potassium chloride solution.
B. A sample of bromine reacts with potassium iodide solution.
C. A sample of chlorine has a higher density than a sample of bromine.
D. A sample of chlorine is a darker colour than a sample of bromine.