AS & A Level Chemistry (9701) — May–June 2023, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Element X has six more protons than element Y. Which statement must be correct? A Atoms of element Y are smaller than atoms of element X. B Element X has a full shell of…
Answer this question and get it marked →Which statement explains why calcium has a higher melting point than barium? A Calcium cations are smaller than barium cations and have a stronger attraction to the delocalised…
Answer this question and get it marked →Three statements about potassium and chlorine and their ions are listed. 1 The atomic radius of a potassium atom is greater than the atomic radius of a chlorine atom. 2 The first…
Answer this question and get it marked →For which equilibrium do both of the equilibrium constants Kc and Kp have no units? A H2(g) + I2(g) ⇌ 2HI(g) B N2(g) + 3H2(g) ⇌ 2NH3(g) C N2O4(g) ⇌ 2NO2(g) D SO2(g) + ½O2(g) ⇌…
Answer this question and get it marked →Calcium carbide, CaC2, reacts with water, as shown. The data below the equation show, in kJ mol⁻¹, the standard enthalpies of formation of the compounds involved. CaC2(s) + H2O(l)…
Answer this question and get it marked →In the sodium chloride lattice the number of chloride ions that surround each sodium ion is called the coordination number of the sodium ions. What are the coordination numbers of…
Answer this question and get it marked →Histidine is an amino acid. The displayed structure of histidine is shown, with bond angles labelled 1, 2 and 3. Bond angle 1 is the C-N-H angle inside the aromatic imidazole…
Answer this question and get it marked →The Contact process takes place at a pressure between 100 000 Pa and 200 000 Pa. A catalyst is used. Which statement is correct? A A V2O5 catalyst is added to increase the…
Answer this question and get it marked →Bromine reacts with aqueous sodium hydroxide at 25 °C. reaction 1: Br2(aq) + 2NaOH(aq) → NaBr(aq) + NaOBr(aq) + H2O(l) The NaOBr formed is unstable at 25 °C and reacts further.…
Answer this question and get it marked →Which statement is correct? A The relative atomic mass of a ³⁵Cl atom is 35.5. B The relative formula mass of CaCO3 is 100.1. C The relative isotopic mass of a ²⁴Mg atom is 24.3.…
Answer this question and get it marked →Iodine and propanone react according to the following equation. I2(aq) + CH3COCH3(aq) → CH3COCH2I(aq) + HI(aq) If the concentration of propanone is increased, keeping the total…
Answer this question and get it marked →Four successive ionisation energies (IE) of element E are shown. Element E is in Period 3 of the Periodic Table. fifth IE / kJ mol⁻¹ sixth IE / kJ mol⁻¹ seventh IE / kJ mol⁻¹…
Answer this question and get it marked →In this question you should assume that the gas formed behaves as an ideal gas. A 1.7 g sample of Mg reacts with 50.0 cm³ of 2.2 mol dm⁻³ HCl at 303 K and 110 400 Pa. Which volume…
Answer this question and get it marked →Chlorine dioxide, ClO2, reacts with aqueous sodium hydroxide to produce water and a mixture of two sodium salts, NaClO2 and NaClO3. What is the mole ratio of NaClO2 to NaClO3 in…
Answer this question and get it marked →The temperature of a sample of an inert gas is increased. What effect does this have on the number of molecules with the most probable energy and on the number of molecules with…
Answer this question and get it marked →For which compound is there the greatest percentage loss of mass on strong heating? A anhydrous calcium carbonate B anhydrous calcium nitrate C anhydrous magnesium carbonate D…
Answer this question and get it marked →The solids sodium chloride and sodium iodide both react with concentrated sulfuric acid at room temperature. With NaCl, the products are NaHSO4 and HCl. With NaI, the products are…
Answer this question and get it marked →SiO2 has a melting point of 1713 °C. It reacts with hot NaOH(aq) to form sodium silicate, Na2SiO3, and water. No reaction occurs when SiO2 is added to hot H2SO4(aq). What can be…
Answer this question and get it marked →Element X has the second largest atomic radius in its period. An atom of X has three occupied electron shells only. The oxide of X is shaken with water. What could be the pH of…
Answer this question and get it marked →Which emission from an internal combustion engine contributes to the erosion of marble statues? A carbon monoxide B nitrogen C nitrogen dioxide D unburnt hydrocarbons
Answer this question and get it marked →The diagram shows the melting points of eight elements with consecutive atomic numbers. The graph plots melting point / K against atomic number, with eight points labelled; A and…
Answer this question and get it marked →The boiling points of Br2, ICl and IBr are given in the table. Br2 ICl IBr --- --- --- --- boiling point / °C 59 97 116 Which row explains why the boiling point of ICl is greater…
Answer this question and get it marked →A solution contains both Mg²⁺(aq) and Sr²⁺(aq) at the same concentration. The solution is divided into two equal portions. Aqueous sodium hydroxide is added dropwise to one…
Answer this question and get it marked →Structural isomerism and stereoisomerism should be considered when answering this question. If a molecule contains two non-identical chiral carbon atoms, four optical isomers…
Answer this question and get it marked →Which reagent will react with pentan-3-ol to give a mixture of stereoisomers? A acidified potassium dichromate B concentrated sulfuric acid C ethanoic acid in the presence of a…
Answer this question and get it marked →An organic molecule W contains 3 carbon atoms. It requires 4.5 molecules of oxygen for complete combustion. What could W be? A propane B propanoic acid C propanone D propan-1-ol
Answer this question and get it marked →Which equation represents a reaction that proceeds through initiation, propagation and termination steps? A C4H10 + Cl2 → C4H9Cl + HCl B C5H11Br + NaOH → C5H11OH + NaBr C C6H12 +…
Answer this question and get it marked →Structural isomerism and stereoisomerism should be considered when answering this question. A set of isomeric hydrocarbons: all contain 14.3% by mass of hydrogen; all react with…
Answer this question and get it marked →Which row describes the solvent used and type of reaction occurring when bromoethane reacts with NaOH to form ethene? solvent type of reaction --- --- --- A ethanol elimination B…
Answer this question and get it marked →Which row describes the type of reaction that occurs when propan-1-ol reacts to form the named carbon-containing product? carbon-containing product type of reaction --- --- --- A…
Answer this question and get it marked →Which statement describes what happens when 2-chloro-2-methylpropane is warmed with NaOH(aq)? A This secondary halogenoalkane reacts by a mixture of an SN1 and an SN2 mechanism. B…
Answer this question and get it marked →How many structurally isomeric secondary alcohols are there with the molecular formula C5H12O? A 1 B 2 C 3 D 4
Answer this question and get it marked →Which reagent can confirm the presence of a carbonyl group in an organic compound and does not distinguish between aldehydes and ketones? A acidified K2Cr2O7 B 2,4-DNPH reagent C…
Answer this question and get it marked →Which compound gives a positive test with alkaline aqueous iodine and does not show optical isomerism? A CH3COCH2CH2OH B CH3CH2CH(OH)CHO C CH3COCH(OH)CH3 D (CH3)2C(OH)CHO
Answer this question and get it marked →Two samples of compound X were treated separately with different reagents which were added in excess. Compound X is a hydroxy-ketone-aldehyde (a chain bearing a secondary alcohol,…
Answer this question and get it marked →Which method could produce butanoic acid? A an acid-base reaction involving CH3CH2CH2CO2Na B the hydrolysis of CH3CH2CH2CH2CN C the acidic hydrolysis of CH3CH2COOCH2CH2CH3 D the…
Answer this question and get it marked →Which ester may be hydrolysed to produce two products, one of which may be reduced to the other? A CH3CH2CO2CH3 B CH3CH(CH3)CO2CH2CH(CH3)2 C CH3CH2CO2CH(CH3)2 D (CH3)2CHCO2CH(CH3)2
Answer this question and get it marked →Two compounds, X and Y, are mixed and a little concentrated H2SO4 is added. Ester Z is found in the resulting mixture of products. Ester Z is a triester of propane-1,2,3-triol…
Answer this question and get it marked →The diagram shows a section of a polymer molecule. –CH2–CH=CH–CH2–CH2–CH=CH–CH2– Which monomer will produce this polymer? A CH2=CH2 B CH3CH=CH2 C CH3CH=CHCH3 D CH2=CH–CH=CH2
Answer this question and get it marked →There are two naturally occurring isotopes of bromine. One isotope has 44 neutrons. The other isotope has 46 neutrons. Ignoring fragments, how many peaks are there in the mass…
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