IGCSE Science - Combined (0653) — October–November 2023, Paper 22
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Four types of cell are listed. 1 egg cell 2 palisade mesophyll cell 3 red blood cell 4 root hair cell Which cell contains chlorophyll and which cell contains haemoglobin? contains…
Answer this question and get it marked →What is osmosis? A the movement of salt across a cell wall B the movement of salt across a partially permeable membrane C the movement of water across a cell wall D the movement…
Answer this question and get it marked →The graph shows enzyme activity as temperature increases. stage 1 stage 2 enzyme activity 0 10 20 30 40 50 60 70 temperature / qC Which row best explains the changes in enzyme…
Answer this question and get it marked →A vegetable contains a high concentration of iron. A person suffering from which condition would benefit the most from eating this vegetable? A anaemia B coronary heart disease C…
Answer this question and get it marked →The diagram shows starch being digested by amylase. amylase starch Which row shows the digestion taking place? chemical mechanical A ✗ ✗ B ✗ ✓ C ✓ ✗ D ✓ ✓
Answer this question and get it marked →Which combination of humidity and temperature would give the lowest transpiration rate in a plant? humidity temperature A low warm B low cool C high warm D high cool
Answer this question and get it marked →Cigarette smoke contains carbon monoxide, nicotine and tar. These substances are harmful to human health. Which row gives the correct information about the harmful effects?…
Answer this question and get it marked →A student is investigating the differences in composition of samples of inspired and expired air. What can he use to test for carbon dioxide? A biuret solution B limewater C…
Answer this question and get it marked →A student sets up the experiment shown. oil layer limewater living animal Which statement is correct? A The limewater stays colourless because decomposition is occurring. B The…
Answer this question and get it marked →Which statement about the growth response of plant roots is correct? A They grow away from gravity and away from light. B They grow away from gravity and towards light. C They…
Answer this question and get it marked →Which row describes asexual reproduction? offspring number of a zygote is genetically identical parents produced to the parent A 1 no yes B 1 yes no C 2 no yes D 2 yes no
Answer this question and get it marked →Which statement describes fertilisation in a flowering plant? A fusion of a pollen nucleus with a nucleus in the ovule B fusion of a pollen nucleus with the stigma C transfer of a…
Answer this question and get it marked →The diagram shows part of the carbon cycle. carbon dioxide in air carbon compounds 4 in animals 1 carbon compounds in plants Where does respiration occur? A 1 only B 2 and 3 C 3…
Answer this question and get it marked →Substance X is an element. It is a gas at room temperature. It is made of X2 molecules. Which diagram represents X? A B C D
Answer this question and get it marked →Which statement about tap water is correct? A It is a compound. B It is a mixture of elements. C It is a pure substance. D It is a solution.
Answer this question and get it marked →Which statement about the boiling points of covalent compounds such as CO2 and ionic compounds is correct? A These covalent compounds have higher boiling points than ionic…
Answer this question and get it marked →An ionic compound contains ammonium ions, NH4+, iron(III) ions, Fe3+, and sulfate ions, SO42–. What is the formula of this compound? A NH4FeSO4 B NH4Fe(SO4)2 C (NH4)2FeSO4 D…
Answer this question and get it marked →Which statement about chemical reactions is not correct? A A higher temperature increases the rate of an endothermic reaction. B Chemical energy is transferred to thermal energy…
Answer this question and get it marked →Lead can be extracted from lead(II) oxide by heating with carbon. The equation for the reaction is shown. 2PbO + C → 2Pb + CO2 Which statement about this reaction is correct? A…
Answer this question and get it marked →Dilute hydrochloric acid is added to powdered solid X. Hydrogen gas is produced. dilute hydrochloric acid powdered solid X What is X? A zinc B zinc carbonate C zinc hydroxide D…
Answer this question and get it marked →Which test is used to identify ammonia? A A glowing splint relights. B Damp blue litmus paper is bleached. C Damp red litmus paper turns blue. D Limewater turns milky.
Answer this question and get it marked →Which properties of argon, Ar, can be determined from its position in the Periodic Table? 1 its number of outer-shell electrons 2 its density 3 its chemical reactivity A 1, 2 and…
Answer this question and get it marked →The equation for the reaction between aqueous potassium iodide and aqueous bromine is shown. 2KI + Br2 → 2KBr + I2 Which statement about this reaction is correct? A Bromine acts…
Answer this question and get it marked →Which substance does not react with dilute hydrochloric acid to produce copper chloride? A copper B copper carbonate C copper hydroxide D copper oxide
Answer this question and get it marked →Part of the reactivity series of metals is shown. calcium most reactive magnesium aluminium iron copper silver least reactive Metal X is the most reactive metal that can be…
Answer this question and get it marked →Which two substances react together to increase the concentration of a gas in the air that may contribute to climate change? A sodium oxide and carbon B potassium carbonate and…
Answer this question and get it marked →Decane is an alkane. Which statement about decane is correct? A It burns in air to form carbon dioxide and hydrogen. B It is an unsaturated hydrocarbon. C It only contains single…
Answer this question and get it marked →An object travels 6.0 km in two minutes. What is its speed? A 0.050 m / s B 3.0 m / s C 50 m / s D 3000 m / s
Answer this question and get it marked →An object is moved from one location to a second location where the gravitational field strength is different. What happens to the mass of the object and what happens to the…
Answer this question and get it marked →A car has an initial kinetic energy of 120 kJ at the bottom of a slope. The car is driven up the slope. At the top of the slope, the car has 260 kJ of kinetic energy and has…
Answer this question and get it marked →For which energy resource is the Sun the only source? A geothermal B natural gas C nuclear D tidal
Answer this question and get it marked →Which source of energy used on Earth is due mainly to the Moon? A geothermal B hydroelectric C tidal D wind
Answer this question and get it marked →Which statement about the boiling point of a substance is correct? A At all temperatures above its boiling point, a substance must be a gas. B At all temperatures above its…
Answer this question and get it marked →The diagram shows three wave crests on a wave formed by dipping a finger into water at P at regular intervals. wave crests P x Three wave crests are produced every six seconds.…
Answer this question and get it marked →The ray diagram shows a thin converging lens used as a magnifying glass. image object 20 cm 10 cm 15 cm What is the focal length of the lens? A 10 cm B 15 cm C 20 cm D 30 cm
Answer this question and get it marked →A loudspeaker vibrates at different frequencies. Which frequency of vibration does not produce a sound that a human can hear? A 60 Hz B 600 Hz C 6.0 kHz D 60 kHz
Answer this question and get it marked →A plastic rod is rubbed with a woollen cloth. The rod becomes negatively charged. What happens to the woollen cloth? A It gains electrons and becomes negatively charged. B It…
Answer this question and get it marked →In an X-ray machine, a beam of electrons hits a metal block. The moving electrons in the beam are a current of 0.30 A. How long does it take for 60 mC of charge to hit the block?…
Answer this question and get it marked →A copper wire has a resistance of 8.0 Ω. A second copper wire has double the length and double the diameter of the first wire. What is the resistance of the second copper wire? A…
Answer this question and get it marked →Which two combinations of resistors in parallel have an equal combined resistance? P Q R S 30 : 20 : 15 : 16 : 30 : 60 : 15 : 48 : A P and Q B P and S C Q and R D R and S…
Answer this question and get it marked →← October–November 2023 Paper 23 · October–November 2023 Paper 21 →