Cambridge AssessmentCambridge International AS A LevelCANDIDATENAMECENTRECANDIDATENUMBERNUMBERCHEMISTRY970122Paper 2 AS Level Structured QuestionsFebruary/March 20231 hour 15 minutesYou must answer on the question paper.No additional materials are needed.INSTRUCTIONS.Answer all questions.Use a black or dark blue pen.You may use an HB pencil for any diagrams or graphs.Write your name,centre number and candidate number in the boxes at the top of the page.Write your answer to each question in the space provided.Do not use an erasable pen or correction fluid.Do not write on any bar codes.You may use a calculator.You should show all your working and use appropriate units.INFORMATION.The total mark for this paper is 60.The number of marks for each question or part question is shown in brackets ]The Periodic Table is printed in the question paper.Important values,constants and standards are printed in the question paper.This document has 16 pages.Any blank pages are indicated.DC(RW/CB)309508/3©UCLES2023[Turn over21 The Pauling electronegativity values of elements can be used to predict the chemical properties ofcompounds.Use the information in Table 1.1 to answer the following questions.Table 1.1elementHLiPauling electronegativity value2.11.02.53.52.6first ionisation energy/kJmol-11310519109013101000second ionisation energy/kJmol-17300235033902260(a)(i)Define electronegativity.[1(ii)O and S are in Group 16.Explain the difference in the Pauling electronegativity values of O and S.(b)(i)LiH is an ionic compound.Draw a dot-and-cross diagram of LiH.Include all electrons.(ii)Suggest the shape of a molecule of H,S.©UCLES2023970122/F/M233(c)(i)Write an equation that represents the first ionisation energy of H.(ii)Explain why there is no information given in Table 1.1 for the second ionisation energyof H.(iii)Give the full electronic configuration of S2*(g).(d)CO,and SO,are acidic gases.(i)Write an equation for the reaction of SO,with H2O.(ii)Write an equation for the reaction of SO,with NaOH.(iii)Construct an equation for the reaction of CO,with Mg(OH).©UCLES2023