OCR A LEVEL JUNE 2022 CHEMISTRY A PAPER 2 QUESTION PAPER Download For Guaranteed A

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You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which statement is correct for the different rates of hydrolysis of RCl and ... RBr? A RBr is hydrolysed faster because Cl is more electronegative than Br. B RBr is hydrolysed faster because the C–Cl bond enthalpy is greater than C–Br. C RCl is hydrolysed faster because Cl is more electronegative than Br. D RCl is hydrolysed faster because the C–Br bond enthalpy is greater than C–Cl. Your answer [1] 2 Which statement about absorption of radiation is correct? A Infrared radiation can result in the breakdown of the ozone layer. B Ultraviolet radiation can cause some polymers to photodegrade to benefit the environment. C Ultraviolet radiation is linked to global warming. D Ultraviolet radiation is used in modern breathalysers to measure ethanol in the breath. Your answer [1] 3 What is the number of sigma bonds in a molecule of methylbenzene? A 7 B 10 C 12 D 15 Your answer [1] © OCR 2022 3 4 The skeletal formula of an organic compound is shown below. N OH O Which functional groups are present? A amide and alcohol B amide and carboxylic acid C amine and carboxylic acid D amine, ketone and alcohol Your answer [1] 5 The structure of a drug is shown below: O How many chiral carbon atoms are there in a molecule of the drug? A 5 B 6 C 7 D 8 Your answer [1] © OCR 2022 Turn over 4 6 Which process has the highest atom economy for preparing ethene, C2H4? In each process, assume that ethene is the only product that is used. A C10H22 3C2H4 + C4H10 B C6H14 2C2H4 + C2H6 C C2H5Cl C2H4 + HCl D C2H5OH C2H4 + H2O Your answer [1] 7 Complete combustion of 0.050 mol of an alkane produces 5.40 g of H2O. What is the molecular formula of the alkane? A C2H6 B C3H8 C C4H10 D C5H12 Your answer [Show More]

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