Bond enthalpy for the ch bond is a 3296 kj mol1 b 4120

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: B +412.0 kJ mol–1 C +1648 kJ mol–1 D +6592 kJ mol–1 (Total for Question 5 = 1 mark) *N37962A0324* 3 Turn over 6 The graph below represents the successive ionization energies of an element X plotted against the number of the electron removed. X is not the symbol for the element. 5 4.5 Logarithm 4 ionization 3.5 energy 3 2.5 2 0 2 4 6 8 Electron removed 10 12 (a) From this graph it is possible to deduce the group in the Periodic Table to which X belongs. X is in (1) A Group 1 B Group 3 C Group 5 D Group 7 (b) From the graph it is possible to deduce that the most stable ion of X will be (1) A X3+ B X+ C X– D X3– (Total for Question 6 = 2 marks) Use this space for any rough working. Anything you write in this space will gain no credit. 4 *N37962A0424* 7 Element R is in Group 1 of the Periodic Table and element T is in Group 6. R and T are not the symbols for the elements. (a) The compound of R and T will have the formula (1) A RT B RT6 C RT2 D R2T (b) The compound of R and T will have bonding which is predominantly (1) A ionic. B covalent. C dative covalent. D metallic. (c) In terms of its electrical conductivity, the compound of R and T will (1) A conduct when solid and liquid. B conduct when solid but not when liquid. C conduct when liquid but not when solid. D not conduct when solid or liquid. (Total for Question 7 = 3 marks) Use this space for any rough working. Anything you write in this space will gain no credit. *N37962A0524* 5 Turn over 8 Ethane reacts with chlorine when the substances are exposed to UV radiation. (a) The equation for this reaction is (1) A C2H6 + Cl2 C2H5Cl + HCl B C2H6 + Cl2 C2H4Cl2 + H2 C C2H6 + Cl2 2CH3Cl D C2H4 + Cl2 C2H4Cl2 (b) The role of the UV radiation in the reaction is to (1) A break the Cl Cl bond forming Cl• free radicals. B break the Cl Cl bond forming Cl+ and Cl– ions. C break the C C bond in ethane forming CH3• free radicals. D break a C H bond in ethane forming C2H5• free radicals. (c) The overall reaction between ethane and chlorine is best described as (1) A addition. B homolytic fission. C heterolytic fission. D substitution. (Total for Question 8 = 3 marks) Use this space for any rough working. Anything you write in this space will gain no credit. 6 *N37962A0624* 9 This question concerns the following compounds A B C D Which of these compounds will show geometric (E–Z or cis/trans) isomerism? A B C D (Total for Question 9 = 1 mark) 10 The correct name for the compound shown below is A 2-methylbut-3-ene B 3-methylbut-2-ene C 3-methylbut-3-ene D 2-methylbut-2-ene (Total for Question 10 = 1 mark) 11 Most compounds of lead are insoluble, an exception being lead(II) nitrate. Therefore a good method of preparing lead(II) sulfate is A adding dilute sulfuric acid to lead metal. B adding concentrated sulfuric acid to lead metal. C adding dilute sulfuric acid to lead(II) nitrate solution. D adding dilute sulfuric acid to solid lead(II) oxide. (Total for Question 11 = 1 mark) *N37962A0724* 7 Turn over...
View Full Document

Ask a homework question - tutors are online