Tiêu đề Feb-March_2025_9701_22_QP - Crack A Level.pdf ✅

4 © UCLES 2025 9701/22/F/M/25 (c) 1,2-dichloroethane, ClCH2CH2Cl, reacts with NaOH to produce an unsaturated compound, C2H3Cl, as shown in reaction 7. reaction 7 ClCH2CH2Cl + NaOH C2H3Cl + H2O + NaCl (i) State what is meant by unsaturated. ........................................................................................................................................... ..................................................................................................................................... [1] (ii) State the conditions for reaction 7. ..................................................................................................................................... [1] (d) Compound D contains carbon, hydrogen and chlorine only. Fig. 1.2 shows the mass spectrum of D. 20 0 20 40 60 80 100 30 40 m/e abundance /% 50 60 1 2 Fig. 1.2 (i) Explain the relative abundance of peaks 1 and 2 in the mass spectrum in Fig. 1.2. ........................................................................................................................................... ..................................................................................................................................... [1] (ii) Suggest the structure of D. [1] [Total: 17] * 0000800000004 * , , ĬÕú3⁄4Ġ ́íÈõÏĪÅĊàú·Ā× Ĭé÷óÔĞđħìþôõĈþþĂõĂ ĥąåĕõõÅÕÕĥÕąąμĥĕĕÕ DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN