And covalent total for question 12 1 mark 13 which of

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Unformatted text preview: entene B butane + butene C pentane + propene D heptane + ethene (Total for Question 13 = 1 mark) Use this space for any rough working. Anything you write in this space will gain no credit. *N35131A0724* www.XtremePapers.net 7 Turn over 14 This question is about the organic compounds with skeletal formulae as shown: A B C D (a) Which compound is 2-methylpropane? (1) A B C D (b) Which compound has the molecular formula C5H12? (1) A B C D (c) Which compounds are isomers? (1) A B compound B and compound C C compound B and compound D D 8 compound A and compound C compound C and compound D *N35131A0824* www.XtremePapers.net (d) Which compound reacts with acidified potassium manganate(VII) to form a diol? (1) A B C D (Total for Question 14 = 4 marks) 15 The structural formula of 5-chloro-2,2-dimethylhexane is H A CH3 CH3 C CH2 C H Cl CH3 Cl B H C CH3 CH2 CH2 CH2 C Cl CH3 Cl C CH3 C CH3 CH2 CH2 C CH3 H CH3 CH3 Cl D CH3 Cl C CH2 CH3 CH2 C CH3 CH3 (Total for Question 15 = 1 mark) TOTAL FOR SECTION A = 20 MARKS *N35131A0924* www.XtremePapers.net 9 Turn over SECTION B Answer ALL the questions. Write your answers in the spaces provided. 16 Magnesium chloride can be made by reacting solid magnesium carbonate, MgCO3, with dilute hydrochloric acid. (a) Write an equation for the reaction, including state symbols. (2) (b) Give TWO observations you would make when the reaction is taking place. (2) ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (c) In an experiment to make crystals of hydrated magnesium chloride, MgCl2.6H2O, magnesium carbonate was added to 25 cm3 of hydrochloric acid with concentration 2.0 mol dm–3. The molar mass of magnesium carbonate is 84.3 g mol–1. (i) How many moles of acid are used in the reaction? (1) (ii) What mass of magnesium carbonate, in grams, reacts with this amount of acid? (1) (iii) Suggest why slightly more than this mass of magnesium carbonate is used in practice. (1) ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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This note was uploaded on 09/22/2013 for the course CHEMISTRY Organic Ch taught by Professor Yang during the Fall '12 term at British School Of Washington.

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