ACSI Paper 2 Prelim

1 YEAR 6 PRELIMINARY EXAMINATION 2023 INTERNATIONAL BACCALAUREATE DIPLOMA PROGRAMME CHEMISTRY HIGHER LEVEL PAPER 2 Wednesday 13 th September 2023 2 hours 15 minutes INSTRUCTIONS TO CANDIDATES  Do not open this examination paper until instructed to do so.  Write your candidate session number in the box above.  A calculator is required for this paper.  A copy of the Chemistry Data Booklet is required for this paper.  Write your answers in the boxes provided.  If you use additional sheets of paper for your answer, attach them to the booklet. Indicate the question number clearly on these sheets.  All drawings must be in ink. For examiner’s use Qn 1 /6 Qn 2 /22 Qn 3 /8 Qn 4 /10 Qn 5 /13 Qn 6 /9 Qn 7 /15 Qn 8 /7 Wrong s.f. /units Total /90 ________________________________________________________________________ This question paper consists of 31 printed pages including this cover page. Name Candidate Number

2 Answer all questions. Write your answers in the boxes provided. 1. Carbon consists of 4 allotropes in the form of diamond, graphite, fullerene and graphene. (a) State and explain the difference in electrical conductivity of diamond and graphite. [2] ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ..................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... ...................................................................................................................................................... (b) Explain why the carbon-carbon bonds in graphite are stronger than the carbon- carbon bonds found in diamond. [2] ...................................................................................................................................................... ....................................................................................................................................................