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Unformatted text preview: a(s) + ½N2(g) + 1½O2(g) → NaNO3(s) 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
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?
(b) Which element could be X in a covalent compound with formula HX?
(c) Which element could be Y in an ionic compound with formula YH2?
(Total for Question 6 = 3 marks) 4 *N35131A0424* www.XtremePapers.net
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?
(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
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
(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
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 Questi...
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- Fall '12