IGCSE Physical Science (0652) — October–November 2024, Paper 21
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which statement describes and explains the relative rates of diffusion of carbon dioxide and of methane? A Carbon dioxide diffuses more rapidly because its molecules have a higher…
Answer this question and get it marked →In an experiment, the mass of a sample of solid calcium carbonate is measured and added to a conical flask containing exactly 25.0 cm³ of dilute hydrochloric acid. Which…
Answer this question and get it marked →The chromatogram obtained from a coloured dye and part of a ruler are shown. The solvent front is at a high position; the baseline is at the bottom; the centre of the dye spot is…
Answer this question and get it marked →Some salt is dissolved in water to form a solution. More water is added to the solution. Which row identifies the solute and the change in concentration of the salt solution?…
Answer this question and get it marked →Which statement about solid sodium chloride is correct? A It contains negative ions formed by the gain of electrons by sodium atoms. B It has a lattice structure with alternating…
Answer this question and get it marked →In which pair of molecules do both molecules use the same number of electrons to form covalent bonds? A C₂H₄ and CH₃OH B CO₂ and CH₄ C N₂ and O₂ D NH₃ and H₂O
Answer this question and get it marked →Which statement about the structure of diamond is correct? A Each atom has only three covalent bonds. B Electrons in the structure are free to move. C It is made up of layers of…
Answer this question and get it marked →The equation for the decomposition of hydrogen peroxide, H₂O₂, is shown. 2H₂O₂ → 2H₂O + O₂ Which volume of oxygen at r.t.p. is produced when 20.0 cm³ of 0.05 mol / dm³ of H₂O₂…
Answer this question and get it marked →Molten sodium iodide is electrolysed using inert electrodes. Which row identifies the ions that move to the cathode and what happens to those ions at the cathode? ion what happens…
Answer this question and get it marked →The rate of a chemical reaction changes when the conditions are changed. Which change in conditions increases both the frequency of collisions between particles and the number of…
Answer this question and get it marked →Which row about oxidation reactions is correct? oxidation oxidising agent --- --- --- A gain of oxygen loses oxygen B gain of oxygen gains oxygen C loss of oxygen loses oxygen D…
Answer this question and get it marked →Which statement describes the behaviour of an acid and a base in aqueous solution? A An acid accepts electrons and a base donates electrons. B An acid donates electrons and a base…
Answer this question and get it marked →A sample of aqueous copper(II) chloride is mixed with aqueous ammonia until the ammonia is in excess. A separate sample of aqueous copper(II) chloride is mixed with acidified…
Answer this question and get it marked →Lithium has a lower density than sodium. Sodium is more reactive than lithium. Which statement predicts the properties of the Group I element, rubidium? A It is less dense and…
Answer this question and get it marked →Which statements describe properties of transition elements? 1 They do not conduct electricity when solid. 2 They form coloured compounds. 3 They have high densities. 4 They have…
Answer this question and get it marked →Zinc is a metal which has many uses. When zinc is mixed with copper it forms ......1...... which is an ......2...... . Zinc is also used in the process of ......3...... to protect…
Answer this question and get it marked →Which statement is correct? A Carbon dioxide, formed by the complete combustion of carbon-containing substances, is a greenhouse gas. B Carbon dioxide, formed by the incomplete…
Answer this question and get it marked →Which statement about lime (calcium oxide) is correct? A It is manufactured by the action of heat on hematite. B It is manufactured by the action of heat on limestone. C It is…
Answer this question and get it marked →One member of the alkane homologous series is butane which is used as a fuel. What are the products of combustion when butane is burned in excess air? A carbon and water B carbon…
Answer this question and get it marked →The formulae of four compounds are shown. 1 C₂H₆ 2 C₄H₈ 3 C₇H₁₄ 4 C₁₀H₂₂ Which compounds will decolourise bromine water? A 1 and 2 B 1 and 4 C 2 and 3 D 2 and 4
Answer this question and get it marked →How is the velocity of a moving object related to the speed of the object? A Speed has the same magnitude as velocity but speed also has direction. B Speed is equal to the rate of…
Answer this question and get it marked →In an experiment, a metal sphere falls in a vacuum inside a glass tube (diagram shows a metal sphere falling through an evacuated glass tube). Which statement is correct? A The…
Answer this question and get it marked →The diagram shows a glass that can hold water. The parts of the glass are labelled: bowl (top), stem (middle) and base (bottom). Which change makes the glass more stable? A…
Answer this question and get it marked →A student does work by pulling a box across a horizontal floor. She now pulls a second box across the same floor. Which row indicates that the student does twice as much work when…
Answer this question and get it marked →A ball of mass 200 g is thrown with an initial speed of 20 m / s. What is the initial kinetic energy of the ball? A 4.0 J B 40 J C 400 J D 40 000 J
Answer this question and get it marked →A power station uses nuclear fission to generate electricity. In this process, energy from the nuclear fuel is transferred to energy in water. What is the energy stored in the…
Answer this question and get it marked →The diagram shows the dimensions of a liquid-in-glass thermometer and the positions of two fixed points on the thermometer scale. The 0 °C mark is 2.0 cm above the bottom of the…
Answer this question and get it marked →A laboratory is built on the Moon. There is no air on the Moon. Which diagram shows how energy is lost as heat from the laboratory? A radiation but no convection current, plus…
Answer this question and get it marked →Which row describes what a wave does? transfers energy transfers matter --- --- --- A no no B no yes C yes no D yes yes
Answer this question and get it marked →A converging lens of focal length 15 cm is used as a magnifying glass to produce a virtual, magnified image of an object. What is a possible position of the object? A 8.0 cm from…
Answer this question and get it marked →Which row contains electromagnetic waves in order of increasing wavelength? smallest wavelength largest wavelength --- --- --- --- --- A ultraviolet X-rays microwaves radio B…
Answer this question and get it marked →The diagram shows a longitudinal wave on a spring. Two lengths p and q are marked, and two points X and Y are labelled. Length p spans one full wavelength region while q spans a…
Answer this question and get it marked →The diagram shows a battery connected to a 12 Ω resistor and a voltmeter. The reading on the voltmeter is 24 V. Which row shows the current in the circuit and the electromotive…
Answer this question and get it marked →Which resistor combination has a combined resistance of 160 Ω? A a 120 Ω resistor in series with two 80 Ω resistors that are in parallel with each other B a 100 Ω resistor in…
Answer this question and get it marked →The current in an electric heater is 8.0 A. The circuit of the heater is not fitted with a fuse. The heater is switched off and a 5.0 A fuse is added to the circuit of the heater.…
Answer this question and get it marked →A magnet is pushed towards a coil of wire (diagram shows a bar magnet, north pole N then south pole S, being pushed to the left towards a vertical coil). An electromotive force…
Answer this question and get it marked →A transformer is 100% efficient. The transformer has 20 turns on the primary coil and 60 turns on the secondary coil. The primary coil is connected to a 12 V a.c. supply. What is…
Answer this question and get it marked →The diagram shows two types of emission from a radioactive source. The emissions pass through a uniform magnetic field directed into the page. One type of emission follows path P…
Answer this question and get it marked →Strontium-90 (Sr) is a radioactive isotope. A nucleus of strontium-90 undergoes β-decay to form an yttrium (Y) nucleus. The decay is represented by the equation shown. ⁹⁰ₚSr →…
Answer this question and get it marked →A sample of a radioactive isotope is placed near a detector in a laboratory, with no shielding from background radiation. The graph shows how the count rate (counts / min) from…
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