Cambridge Past Paper Questions
Browse 23,045questions from 25 years of O-Level & A-Level exams. Click any question to practice.
In this experiment, you will measure the efficiency of a small electric heater constructed from a coil of wire. You are provided with a circuit con...
You will investigate the refraction of light through a transparent block. You are provided with: • a rectangular transparent block • an illuminated...
You will measure the average mass of a marble (glass ball) and investigate the speed of a marble rolling down a slope. You are provided with: • a s...
A solar cell is a device that can generate electrical power when light falls on it. You are given a solar cell connected to a fixed resistor as in ...
In this experiment you will investigate a light dependent resistor (LDR). You are provided with: • a power supply • a switch • a voltmeter with two...
In this experiment, you will investigate the absorption of thermal radiation by different coloured surfaces. You are provided with: • a lamp connec...
In this experiment you will use a balancing method to determine the mass of a metre rule. You have been provided with: • a metre rule with a millim...
A student investigates the rate of cooling of hot water in a beaker. Plan an experiment to investigate the relationship between the thickness of th...
A student measures the efficiency of a small electric heater.
A student investigates the refraction of light through a transparent block.
A student measures the average mass of a marble (glass ball) and investigates the speed of a marble rolling down a slope.
A student investigates a light dependent resistor (LDR). The student constructs a series circuit consisting of a power supply, the LDR, a 560 Ω res...
A student investigates the absorption of thermal radiation by different coloured surfaces. The student has arranged a thermometer which has a piece...
A student uses a balancing method to determine the mass of a metre rule.
Which compound contains two different elements with identical oxidation states?
For the element sulfur, which pair of ionisation energies has the largest difference between them?
Which ion has both more electrons than protons and more protons than neutrons? [H = ¹H; D = ²H; O = ¹⁶O]
Which species contains the smallest number of electrons?
Nitric oxide, NO, and bromine vapour react together according to the following equation. 2NO(g) + Br₂(g) → 2NOBr(g) ΔH = -23 kJ mol⁻¹ The reaction ...
Which series shows molecules in order of increasing bond angle?
What is the volume of steam produced when 1.00g of ice is heated to 323°C at a pressure of 101 kPa?
Solid carbon dioxide, CO₂, is similar to solid iodine, I₂, in its structure and properties. Carbon is in Group 14. Silica, SiO₂, is a Group 14 comp...
An article in a science magazine contains the following statement. 'It is lighter than a feather, stronger than steel, yet incredibly flexible and ...
Which equation has an enthalpy change of reaction which corresponds to the standard enthalpy change of atomisation of chlorine?
In an experiment, 2.00 mol of hydrogen and 3.00 mol of iodine were heated together in a sealed container and allowed to reach equilibrium at a fixe...
Consecutive elements X, Y and Z are in Period 3 of the Periodic Table. Element Y has the highest first ionisation energy and the lowest melting poi...
When dealing with a spillage of metallic sodium it is important that no toxic or flammable products are formed. Which material should be used if th...
Chlorine gas is widely used to treat contaminated water. Which species present in water when chlorine gas has been added is responsible for killing...
Which row of the table is correct?
Hydrogen chloride gas and hydrogen iodide gas have different thermal stabilities. The difference is due to a difference in the energies of some of ...
Ammonium sulfate, (NH₄)₂SO₄, and ammonium nitrate, NH₄NO₃, are used as fertilisers. These salts have different percentages by mass of nitrogen. The...
River water in a chalky agricultural area contains Ca²⁺, Mg²⁺, CO₃²⁻, HCO₃⁻, Cl⁻ and NO₃⁻ ions. In a water treatment plant, such water is treated b...
After black and white photographic film has been developed, unreacted silver bromide is removed by reaction with sodium thiosulfate. AgBr + 2Na₂S₂O...
People who take statin drugs to control their blood cholesterol may also take 'coenzyme Q₁₀'. [Figure showing a simplified structure of one form of...
Geraniol and nerol are compounds found in some flower fragrances. They are isomers of each other. [Figure showing structures of geraniol and nerol]...
A section showing two repeat units of an addition polymer is shown. [Figure showing a section of an addition polymer] What is the identity of the m...
But-2-ene-1,4-diol is converted in two steps through an intermediate X into oxobutanedioic acid. HOCH₂CH=CHCH₂OH but-2-ene-1,4-diol step 1 X step 2...
Hydrogen bromide can be added to T to give compound U. Compound U can be hydrolysed to compound V. [Figure showing structures of T, U, V and reacti...
Structural isomerism and stereoisomerism should be considered in answering this question. Compound J is reacted with KOH dissolved in ethanol. Thre...
Which row correctly shows a primary, a secondary and a tertiary alcohol?
The fragrance compounds of perfumes are often dissolved in solvent Y, which has a molecular formula C₇H₁₂O₄. It is made by reacting propane-1,2-dio...
Which mixture could be used to produce propyl methanoate?
Which statement about poly(chloroethene) is correct?
Which molecules have an overall dipole moment? 1 carbon monoxide, CO 2 phosphine, PH₃ 3 carbon dioxide, CO₂
The diagram illustrates the enthalpy changes of a set of reactions [Figure showing enthalpy cycle R -> S, T -> S, T -> U, U -> R] Which statements ...
Which statements about reversible reactions are correct? 1 An increase in concentration of a reactant always increases the concentration of the pro...
A chemist puts a sample of dilute aqueous hydrochloric acid into beaker 1. She adds a sample of zinc and measures the rate of production of hydroge...
In some rice-growing parts of the world, farmers use a combination of paddy fields and a fish farm. Rice paddy fields are flooded for much of the g...
A sample containing 0.40 mol of calcium nitrate was decomposed by heating in a roaring Bunsen burner flame until there was no further decomposition...
Which reagents, when used in an excess, can be used to make sodium lactate, CH₃CH(OH)CO₂Na, from lactic acid, CH₃CH(OH)CO₂H? 1 Na 2 NaHCO₃ 3 NaOH