1 How many electrons are in a 12Mg 24 2+ ion?
A 10
B 12
C 14
D 22
Your answer
[1]
2 What is the formula of chromium(III) sulfate?
A Cr3SO4
B Cr(SO4)3
C Cr2(SO4)3
D Cr3SO3
Your answer
[1]
3 Which molecule is
...
1 How many electrons are in a 12Mg 24 2+ ion?
A 10
B 12
C 14
D 22
Your answer
[1]
2 What is the formula of chromium(III) sulfate?
A Cr3SO4
B Cr(SO4)3
C Cr2(SO4)3
D Cr3SO3
Your answer
[1]
3 Which molecule is non-polar?
A SF6
B H2S
C PF3
D NH3
Your answer
[1]
3
© OCR 2021 H032/01 Turn over
4 Which row is correct?
Highest pH when added to water Most reactive halogen
A MgO F2
B MgO I2
C BaO F2
D BaO I2
Your answer
[1]
5 Which equation represents a redox reaction?
A Mg + 2HCl → MgCl2 + H2
B MgO + 2HCl → H2O + MgCl2
C MgCO3+ 2HCl → CO2 + H2O + MgCl2
D Mg(OH)2 + 2HCl → MgCl2 + 2H2O
Your answer
[1]
6 This question is about trends in the periodic table.
Which trend is correct?
A melting point decreases from lithium to carbon
B boiling point decreases from fluorine to iodine
C first ionisation energy decreases from lithium to caesium
D first ionisation energy increases from nitrogen to oxygen
Your answer
[1]
4
© OCR 2021 H032/01
7 A sample of a compound M contains 1.46 g of carbon, 0.482 g of hydrogen and
1.69 g of nitrogen.
What is the empirical formula of M?
A CH2N
B C4HN4
C CH4N
D C2H4N
Your answer
[1]
8 A student mixes 100 cm3 of 0.200 mol dm–3 NaCl(aq) with 100 cm3 of
0.200 mol dm–3 Na2CO3(aq).
What is the total concentration of Na+ ions in the mixture formed?
A 0.100 mol dm–3
B 0.200 mol dm–3
C 0.300 mol dm–3
D 0.400 mol dm–3
Your answer
[1]
9 Which mass of substance contains the greatest number of atoms?
A 3.00 g of ammonia, NH3
B 3.00 g of chloromethane, CHCl3
C 4.00 g of hydrogen sulfide, H2S
D 4.00 g of hydrogen chloride, HCl
Your answer
[1]
5
© OCR 2021 H032/01 Turn over
10 Which reagent would exactly neutralise 100 cm3 of 1.00 mol dm–3 H2SO4(aq)?
A 0.100 mol Al(OH)3
B 0.100 mol NH3
C 0.100 mol Ba(OH)2
D 0.100 mol NaOH
Your answer
[1]
11 The table below shows standard enthalpy changes of formation, ∆fH.
Compound NH4NO3(s) H2O(g) CO2(g)
∆fH / kJ mol–1 –366 –242 –394
What is the enthalpy change for the following reaction?
2NH4NO3(s) + C(s) → 2N2 (g) + 4H2O(g) + CO2(g)
A –630 kJ mol–1
B –540 kJ mol–1
C +540 kJ mol–1
D +630 kJ mol–1
Your answer
[1]
6
© OCR 2021 H032/01
12 Carbon monoxide reacts with steam in the following reaction equation:
CO(g) + H2O (g) CO2(g) + H2(g) ∆H = –40 kJ mol–1
Which change will shift the position of equilibrium to the right hand side of the equation?
A decrease in pressure
B increase in pressure
C decrease in temperature
D increase in temperature
Your answer
[1]
13 Which substance contains hydrogen bonding in the liquid state?
A CH3(CH2)4CH3
B CH3(CH2)3CHFCH3
C CH3(CH2)3COCH3
D CH3(CH2)3CH(OH)CH3
Your answer
[1]
14 Which volume of oxygen gas, at room temperature and pressure, is required for complete
combustion of 1.25 × 10−3 mol of propan-1-ol?
A 105 cm3
B 120 cm3
C 125 cm3
D 135 cm3
Your answer
[1]
7
© OCR 2021 H032/01 Turn over
15 Three of the following displayed formulae represent the same isomer of C3H4Cl2 but one structure
represents a different isomer, X.
Which displayed formula represents X?
A B
C D
Your answer
[1]
16 Which alcohol will not react with potassium dichromate(VI) in sulfuric acid?
A CH3CH2CH(OH)CH2CH3
B CH3CH2CH(CH3)CH2OH
C (CH3)2CHCH(CH3)OH
D (CH3CH2)2C(CH3)OH
Your answer
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