2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] File Starts in the Next Page Ace your Mocks!! *JUN237404201 * IB/M/Jun2 3/E6 7404/2 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 Section B TOTAL Tuesday 23 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • the Periodic Table/Data Sheet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate. Instructions • Use black ink or black ball -point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • All working must be shown. • Do all rough work in this book. Cross through any work you do not want to be marked. Information • The marks for questions are shown in brackets. • The maximum mark for this paper is 80. Advice You are advised to spend about 65 minutes on Section A and 25 minutes on Section B. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. AS CHEMISTRY Paper 2 Organic and Physical Chemistry 2 *02* IB/M/Jun23/7404/2 Do not write outside the box Section A Answer all questions in this section. 0 1 This question is about the analysis of organic compounds. For each pair of compounds in Questions 01.1 and 01.2, give a reagent (or combination of reagents) that could be added separately to each compound in a single reaction to distinguish between them. State what is observed in each case. 0 1 . 1 CH 3CH 2CH 2CHO and CH 3CH 2CH(OH)CH 3 [3 marks] Reagent(s) Observation with CH 3CH 2CH 2CHO Observation with CH 3CH 2CH(OH)CH 3 0 1 . 2 Cyclohexane and cyclohexene [3 marks] Reagent(s) Observation with cyclohexane Observation with cyclohexene 3 *03* Turn over ► IB/M/Jun23/7404/2 Do not write outside the box 0 1 . 3 Table 1 gives the precise relative molecular masses ( Mr) of some organic compounds measured using high resolution mass spectrometry. Table 1 Molecular formula C5H12 C5H10 C6H6 Mr 72.1416 70.1260 to be calculated Use these data to find the relative atomic masses ( Ar) of hydrogen and carbon. Give your answers to 4 decimal places. Use these calculated Ar values to find the relative molecular mass ( Mr) of C 6H6 Give your answer to 4 decimal places. [3 marks] Ar of hydrogen Ar of carbon Mr of C 6H6 9
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BestOfLuck. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
