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2022 O Level Pure Chemistry Paper 1 — All Solutions

40 multiple-choice questions · Free video solutions
P1 Q1
Rate of Reaction / Experimental Techniques
A student investigates the rate of reaction between a solid and a liquid. During the reaction, the student measures the …
P1 Q2
Chromatography
X, Y and Z are all mixtures of alcohols. A paper chromatogram is obtained for samples of X, Y and Z. Which row is correc…
P1 Q3
Qualitative Analysis
A crystalline product contains a mixture of two salts. One of the ions present is sodium. A student tests the mixture to…
P1 Q4
Atomic Structure
The nucleus of M¹⁺ contains a total of 27 particles. 13 of the particles have a charge. Which statement about the ion is…
P1 Q5
Structure and Bonding
Sand (silicon dioxide), diamond, graphite and iodine all contain covalent bonds. Which statement is correct?…
P1 Q6
Ionic Bonding
Part of the giant lattice structure of sodium chloride is shown. The structure repeats to make a giant lattice. In the g…
P1 Q7
Covalent Bonding
In one molecule of carbon dioxide, CO₂, what is the total number of electrons present and how many electrons are involve…
P1 Q8
Stoichiometry / Hydrated Salts
Hydrated copper(II) sulfate crystals have the formula CuSO₄·5H₂O in which one mole of copper(II) sulfate is combined wit…
P1 Q9
Empirical Formula / Organic Chemistry
The structure of an organic compound is shown. What is the empirical formula of the compound?…
P1 Q10
Mole / Gas Volumes
Which sample of gas occupies the smallest volume? (All the gases are at the same temperature and pressure.)…
P1 Q11
Acid-Base Titration
A solution containing 0.016 mol of barium hydroxide is added to a conical flask. The aqueous barium hydroxide is titrate…
P1 Q12
Stoichiometry / Reacting Masses
Aqueous sodium chloride and aqueous silver nitrate react according to the equation shown. NaCl(aq) + AgNO₃(aq) → AgCl(s)…
P1 Q13
Electrolysis
The metals L and M form soluble sulfates with the formulae L₂SO₄ and MSO₄. L is a Group I metal. M is a less reactive tr…
P1 Q14
Electroplating
A metal object is electroplated with silver. Which row correctly describes the electrolysis cell used?…
P1 Q15
Energetics / Hess's Law
The enthalpy change for the reaction shown in this equation is X kJ. 2C(s) + 2H₂(g) → 3O₂(g) → 2CO₂(g) + 2H₂O(l). The en…
P1 Q16
Energetics / Activation Energy
Which statement about exothermic and endothermic reactions is correct?…
P1 Q17
Rate of Reaction / Catalysts
These statements are about the activation energy of a chemical reaction. 1 Chemical reactions in gases and liquids take …
P1 Q18
Rate of Reaction
In experiment 1, 1.0 g of zinc granules and 50 cm³ of 0.50 mol/dm³ sulfuric acid react to produce hydrogen gas. The volu…
P1 Q19
Redox / Oxidation States
The reaction between zinc and acidified vanadyl ions, VO²⁺, is shown. Zn + 2VO²⁺ + 4H⁺ → 2V³⁺ + 2H₂O + Zn²⁺. Which eleme…
P1 Q20
Acids and Bases
What is a characteristic property of all bases?…
P1 Q21
Acids and Bases
The table gives some statements about acids and bases and explanations for these statements. Which row shows both a corr…
P1 Q22
Qualitative Analysis / Salts
Aqueous ammonium sulfate is warmed with an excess of aqueous sodium hydroxide. The resulting mixture is neutralised with…
P1 Q23
Preparation of Salts
Copper(II) nitrate is made by reacting an excess of a powdered solid with an aqueous solution. The mixture is filtered a…
P1 Q24
Industrial Chemistry / Haber Process
What is the source of hydrogen in the industrial production of ammonia?…
P1 Q25
Ionic Bonding / Formulae
The group number of an element can help to predict the charge of an ion of that element. What is the formula of aluminiu…
P1 Q26
Transition Elements
Which statement is correct?…
P1 Q27
Reactivity Series / Redox
Which redox reaction is least likely to occur?…
P1 Q28
Reactivity Series / Tests for Gases
An equal number of moles of metal carbonates XCO₃ and ZCO₃ are heated strongly. They both decompose and release a gas. T…
P1 Q29
Metals / Recycling
What should be considered when deciding whether to extract a metal from its ore or recycle the metal? 1 the amount of ra…
P1 Q30
Iron Extraction
Iron is extracted from its ore in a blast furnace in a redox reaction. Which substance is oxidised in a blast furnace?…
P1 Q31
States of Matter
A sample of clean, dry air is cooled to −190 °C. The carbon dioxide forms a solid at −79 °C. The table shows the melting…
P1 Q32
Fractional Distillation of Petroleum
Petroleum is separated by fractional distillation. Which row best describes a fraction collected near the top of the fra…
P1 Q33
Petroleum / Combustion
The table shows the number of carbon atoms present in the molecules in four of the fractions of petroleum. One mole of a…
P1 Q34
Alkenes / Hydration
Which alkene, on addition of H₂O, can produce only one alcohol?…
P1 Q35
Manufacture of Ethanol
Ethanol can be manufactured from ethene or from glucose. The table gives statements about the processes involved. In whi…
P1 Q36
Isomerism
Which two compounds are isomers of each other? 1 butanol. 2 butanoic acid. 3 propanoic acid. 4 ethyl ethanoate.…
P1 Q37
Empirical Formula / Organic Chemistry
In the molecules of which two compounds is the ratio of hydrogen atoms to carbon atoms 2 : 1?…
P1 Q38
Esters
Compound X is an ester. Which acid and alcohol react together to form compound X?…
P1 Q39
Air / Noble Gases
Which noble gas has the highest concentration in dry air?…
P1 Q40
Condensation Polymerisation / Nylon
Nylon is made by the condensation polymerisation of the compounds shown. H₂N–(CH₂)₆–NH₂ HOOC–(CH₂)₄–COOH. What is the …