Chemistry > QUESTION PAPER & MARK SCHEME > Ocs a level chemistry a 2023 exam synthesis and analytical techniques version 2 top prediction 100 (All)

Ocs a level chemistry a 2023 exam synthesis and analytical techniques version 2 top prediction 100

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SECTION A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. Answer all the questions. 1 What is the name of the compound below? H ... 3C C CH2CH3 C H Br A E-3-bromopent-2-ene B E-3-bromopent-3-ene C Z-3-bromopent-2-ene D Z-3-bromopent-3-ene Your answer [1] 2 Which statement about bonds is correct? A The C=C bond in ethene is more polar than the C−C bond in ethane. B A σ-bond is stronger than a π-bond. C The H−C−H bond angle in ethane is greater than the H−C−H bond angle in ethene. D A σ-bond is formed from sideways overlap of p orbitals. Your answer [1] A B4 © OCR 2023 3 Which of these reagent(s) will not react with HOCH2CH2CH2COOH? A NaCN in ethanol B C2H5OH in the presence of an acid catalyst C (CH3CO)2O D concentrated H2SO4 Your answer [1] 4 Which compound can be refluxed with acidified potassium dichromate(VI) to form an organic product with molecular formula C5H8O2? A HO O B HO O O HO C O D HO Your answer [ [Show More]

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