Exam (elaborations)
AS & A Level CHEMISTRY 9701/11 Paper 1 Multiple Choice May/June 2023 Authentic Marking Scheme
AS & A Level CHEMISTRY 9701/11 Paper 1 Multiple Choice May/June 2023 Authentic Marking Scheme
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1 Element X has six more protons than element Y.
Which statement must be correct?
A Atoms of element Y are smaller than atoms of element X.
B Element X has a full shell of electrons.
C Element X and element Y are in the same group.
D Element X and element Y are in the same period.
2 Which statement explains why calcium has a higher melting point than barium?
A Calcium cations are smaller than barium cations and have a stronger attraction to the
delocalisedelectrons.
B The structure of calcium is partly giant molecular.
C Therearemoredelocalisedelectronsincalciumthaninbariumasithasalowerionisation
energy.
D There is greater repulsion between barium atoms as they have more complete electron
shellsthancalciumatoms.
3 Three statements about potassium and chlorine and their ions are listed.
1 The atomic radius of a potassium atom is greater than the atomic radius of a chlorine
atom.
2 The first ionisation energy of potassium is greater than the first ionisation energy of
chlorine.
3 The ionic radius of a potassium ion is greater than the ionic radius of a chloride ion.
Which statements are correct?
A 1 only B 2 only C 1 and 3 D 2 and 3
4 For which equilibrium do both of the equilibrium constants Kc and Kp have no units?
A H2(g) + I2(g) 2HI(g)
B N2(g) + 3H2(g) 2NH3(g)
C N2O4(g) 2NO2(g)
D SO2(g) + O2(g) SO3(g)
8&/(6
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5 Calciumcarbide,CaC2,reactswithwater,asshown.Thedatabelowtheequationshow,inkJmol ,
thestandardenthalpiesofformationofthecompoundsinvolved.
CaC2(s) + H2O(l) → CaO(s) + C2H2(g)
–60 –286 –635 +228
What is the standard enthalpy change of the reaction shown?
–1
A –753 kJ mol
–1
B –61 kJ mol
–1
C +61 kJ mol
–1
D +753 kJ mol
6 Inthesodiumchloridelatticethenumberofchlorideionsthatsurroundeachsodiumioniscalled
thecoordinationnumberofthesodiumions.
Whatarethecoordinationnumbersofthesodiumionsandthechlorideionsinthesodiumchloride
lattice?
coordination number coordination number
of sodium ions of chloride ions
A 4 6
B 6 4
C 6 6
D 8 6
8&/(6
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