AS & A Level Chemistry (9701) — May–June 2024, Paper 42
9 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Describe the trend in the solubility of the sulfates of magnesium, calcium and strontium. Place them in order from most soluble to least soluble. Explain your answer.
Answer this question and get it marked →(i) Lithium nitrate, LiNO3, decomposes on heating in a similar way to Group 2 nitrates to give the metal oxide, a brown gas and oxygen. Write an equation for the decomposition of…
Answer this question and get it marked →Carbon disulfide, CS2, is flammable and reacts readily with oxygen, as shown in reaction 1: CS2(g) + 3O2(g) - CO2(g) + 2SO2(g). Table 3.1 shows the standard enthalpy of formation,…
Answer this question and get it marked →(i) Explain why transition elements have variable oxidation states. (ii) Sketch the shape of a 3d(z2) orbital on a set of x, y, z axes.
Answer this question and get it marked →Nitrosyl chloride, NOCl, can be formed by the reaction between nitrogen monoxide and chlorine: 2NO + Cl2 - 2NOCl. The initial rate of this reaction is investigated, starting with…
Answer this question and get it marked →Aqueous solutions of methanoic acid, HCOOH, and propanoic acid, CH3CH2COOH, are mixed together. An equilibrium is set up between two conjugate acid-base pairs. (i) Define…
Answer this question and get it marked →(i) Give the systematic name of P (a benzene ring bearing a -COOH group and a -NO2 group at the adjacent (2-) position). (ii) P can be synthesised as shown in Fig. 7.2 by…
Answer this question and get it marked →State the relative basicities of phenylamine, C6H5NH2, benzylamine, C6H5CH2NH2, and ammonia, NH3, in aqueous solution. Place them in order from most basic to least basic. Explain…
Answer this question and get it marked →Explain why trichloroethanoic acid, CCl3COOH, is more acidic than ethanoic acid, CH3COOH.
Answer this question and get it marked →