2nano3s b nas n2g 1o2g nano3s c nas

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Unformatted text preview: C Na(s) + N(g) + 3O(g) → NaNO3(s) D Na(g) + ½N2(g) + 1½O2(g) → NaNO3(g) (Total for Question 4 = 1 mark) 5 Which equation represents the reaction for which the enthalpy change, ∆H, is the mean bond enthalpy of the C–H bond? A ¼CH4(g) → ¼C(g) + H(g) B CH4(g) → C(s) + 2H2(g) C CH4(g) → C(g) + 4H(g) D CH4(g) → C(g) + 2H2(g) (Total for Question 5 = 1 mark) *N35131A0324* www.XtremePapers.net 3 Turn over 6 The first ionization energies, in kJ mol–1, of four elements with consecutive atomic numbers are shown below. A 1680 B 2080 C 496 D 738 (a) Which element could be an inert gas? (1) A B C D (b) Which element could be X in a covalent compound with formula HX? (1) A B C D (c) Which element could be Y in an ionic compound with formula YH2? (1) A B C D (Total for Question 6 = 3 marks) 4 *N35131A0424* www.XtremePapers.net 7 The graph below shows the second ionization energy of a series of elements with consecutive atomic numbers. B Second ionization energy / kJ mol–1 A D C Atomic number increasing in steps of 1 Which element could be lithium? A B C D (Total for Question 7 = 1 mark) 8 The first five ionization energies, in kJ mol–1, of aluminium are 578 1817 2745 11 578 14 831 The orbitals from which the first five electrons are removed during ionization, starting with the first electron, are A 1s 2s 2p 3s 3p B 1s 1s 2s 2s 2p C 3p 3s 2p 2s 1s D 3p 3s 3s 2p 2p (Total for Question 8 = 1 mark) *N35131A0524* www.XtremePapers.net 5 Turn over 9 Going across the Periodic Table from sodium to aluminium, A the melting temperature increases. B the radius of the atom increases. C the radius of the metal ion increases. D the bonding in the element changes from metallic to covalent. (Total for Question 9 = 1 mark) 10 Going down Group 1 from lithium to rubidium A the radius of the atom decreases. B the radius of the ion decreases. C the first ionization energy decreases. D the polarizing power of the ion increases. (Total for Question 10 = 1 mark) 11 A drop of concentrated nickel(II) sulfate solution, which is green, is placed on moist filter paper on a microscope slide and the ends of the slide are connected to a 24 V DC power supply. After ten minutes, A a blue colour has moved towards the negative terminal and a yellow colour towards the positive terminal. B a blue colour has moved towards the positive terminal and a yellow colour towards the negative terminal. C a green colour has moved towards the negative terminal but there is no other visible change. D a green colour has moved towards the positive terminal but there is no other visible change. (Total for Question 11 = 1 mark) Use this space for any rough working. Anything you write in this space will gain no credit. 6 *N35131A0624* www.XtremePapers.net 12 The bonding in magnesium oxide, MgO, is A ionic. B metallic and ionic. C ionic and covalent. D metallic and covalent. (Total for Question 12 = 1 mark) 13 Which of the following mixtures could not form when octane, C8H18, is cracked? A propane + p...
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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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