An element has two isotopes: mass 10 (20%) and mass 11 (80%). Calculate its relative atomic mass.
23 marks
Explain why metals are good conductors of electricity and can be bent.
33 marks
Calculate the mass of carbon dioxide produced when 10 g of calcium carbonate is heated.
CaCO₃ → CaO + CO₂ (Mr CaCO₃ = 100, CO₂ = 44)
43 marks
Explain why a pure substance has a sharp melting point, and how this is used.
53 marks
Name the salt formed and the other products when zinc carbonate reacts with hydrochloric acid.
62 marks
Give the half equation for the reaction at the anode in the electrolysis of dilute sulfuric acid.
73 marks
Describe how phytomining is used to extract copper.
82 marks
Explain why a catalyst does not change the position of equilibrium.
93 marks
Compare the properties of thermosoftening and thermosetting polymers.
102 marks
Explain why isotopes of an element have the same chemical properties.
113 marks
Explain why alloys are harder than pure metals.
123 marks
Calculate the mass of carbon dioxide produced when 25 g of calcium carbonate is heated.
CaCO₃ → CaO + CO₂ (Mr CaCO₃ = 100, CO₂ = 44)
132 marks
Explain what a formulation is and give an example.
146 marks
Describe how to carry out a titration to find the volume of acid needed to neutralise 25.0 cm³ of an alkali.
154 marks
Describe how copper is purified by electrolysis.
161 mark
Which metal is most reactive?
173 marks
Describe how waste water is treated.
181 mark
What is the electronic structure of a sodium atom?
193 marks
Explain why nanoparticles may have different properties from the same material in bulk, and give one use and one risk.
203 marks
4.8 g of magnesium burns completely in oxygen. Calculate the mass of magnesium oxide formed. 2Mg + O₂ → 2MgO (Ar Mg = 24, O = 16)
213 marks
Explain the advantages of instrumental methods of analysis such as flame emission spectroscopy.
221 mark
What is the pH of a neutral solution?
233 marks
Explain why electrolysis is expensive and suggest one way the aluminium industry reduces costs.
243 marks
Explain what is meant by oxidation and reduction in terms of electrons.
252 marks
Explain why recycling metals is important.
263 marks
Explain why Mendeleev left gaps in his periodic table and how he was proved right.
272 marks
A cube of side 10 nm. Calculate its surface area to volume ratio.
283 marks
7.2 g of magnesium burns completely in oxygen. Calculate the mass of magnesium oxide formed. 2Mg + O₂ → 2MgO (Ar Mg = 24, O = 16)
293 marks
Describe how to test for halide ions in a solution.
302 marks
Explain why universal indicator is not used in titrations.
313 marks
Predict the products of electrolysis of molten lead(II) bromide and write the anode half equation.
323 marks
Explain why gold is found as the native metal but iron is found as an ore.
333 marks
Explain why copper is used for electrical wiring and aluminium for aircraft.
342 marks
The radius of an atom is about 0.1 nm and the nucleus is about 1 × 10⁻¹⁴ m. How many times larger is the atom than the nucleus?
352 marks
A cube of side 100 nm. Calculate its surface area to volume ratio.
363 marks
Calculate the atom economy for making hydrogen by the reaction CH₄ + H₂O → CO + 3H₂. (Mr: CH₄ 16, H₂O 18, CO 28, H₂ 2)
373 marks
Explain why water is not always a suitable solvent in chromatography.
381 mark
Which particle has a relative mass of almost zero?
Finished?
Answer every question to finish (38 left), or finish when the time’s up.
Score 0 / 100 · 0 of 38 marked
This paper is written by Plasmo in the style of the Edexcel GCSE Chemistry exam. It is not a past paper and is not produced or endorsed by the exam board.
Edexcel GCSE Chemistry Mock Exam: Paper 1, Higher | Plasmo