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Mark scheme 1 (a) (i) (ii) (b) (i) (ii) The number of protons in the affectionateness of an atom 17 2.8.1 Group 1, because it has nonpareil valence negatron Marks 1 1 1 1+1 (iii) Reacts with irrigate to state hydrogen and metal hydroxide Reacts with atomic number 8 to public figure metal oxide Reacts with chlorine gas to produce metal chloride [ any(prenominal)(prenominal) one] (c) (d) (e) Q and R because they have the same proton number provided unlike nucleon number/ number of neutrons S S, Q, P sum total 2 a b alkane (i) (ii) 58 none of breakwatere of CO2 = 12 0 cm3 24000 cm3 // = 0.005 mol 1 1+1 1 1 10 1 1 1 No of mole of C4H10. = 0.005 / 4 // = 0.00125 mol Mass of C4H10. = 0.0125 x 58 = 0.0725 g (c) (i) (ii) (d) notwithstandingene // But 2 - ene C = C // Double stupefy between carbon atoms Accept any one of the isomers 1 1 1 1 1 (e) (I) Hydration 1 (ii) heavy weapon - phosphoric acid Temperature 300 oC Pressure - 60 atm.

any(prenominal) one 1 Total 10 3 (a) (i) Diagram : useable weapon : label - copper(II) chloride solution - carbon electrodes : draw trial run piping to collect gas at anode 1 1 1 1 (ii) float produced is tested with a impatient (wooden) splinter Gas relights the glowing (wooden) splinter (iii) Hydroxide ions forget be attracted to the anode and discharged to skeleton oxygen molecules 1 Cl, OH 1 1 1 (b) (i) (ii) Cl- // chloride ion Cl- ion // chloride ion is more knockout than OHion // hydroxide ion (iii) 2 Cl- ? Cl2 + 2e Total 1 10 a From pink to pale 1 b Experiment 1= 22.40 cm3 2= 22.20 cm3 3= 22.00 cm3 All correct with two quantitative places - 2 mark All corr! ect with one decimal place / 2 correct with 2 decimal places - 1 mark c H2SO4 + 2 NaOH ? K2 SO4 + 2H2O 2 Correct formula for reactants and products equilibrize equation d (i) Average volume = ( 22.40 + 22.20 + 22.00 ) / 3 = 22.30 cm3 1 1 1 ii) The number of mol of sulphuric acid = ( 22.30 × 1.0) / m = 0.0223 mol 1 e f Methyl chromatic 1 Functional apparatus set- up : conical flask,...If you loss to form a full essay, order it on our website: OrderEssay.net

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