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A LevelChemistryAQAExam QuestionsAdvanced Inorganic ChemistryProperties of Period 3 Elements & their Oxides

Properties of Period 3 Elements & their Oxides (AQA A Level Chemistry): Exam Questions

Exam code: 7405

3 hours30 questions

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Properties of Period 3 Elements & their Oxides

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11 mark

Which of the following about sodium oxide, Na2O, is correct?

 

Bonding in Na2O

pH of solution

A

Covalent

9

B

Ionic

14

C

Ionic

10

D

Covalent

12

 

    Choose your answer

    21 mark

    Which of the following statements about aluminium oxide is correct?

    • Aluminium oxide forms an alkaline solution

    • Aluminium oxide has the highest melting point of the Period 3 oxides

    • Aluminium oxide is amphoteric

    • Aluminium oxide has a macromolecular structure

    Choose your answer

    31 mark

    Which of the following is the correct oxidation number for sulfur in H2SO3?

    • +2

    • +4

    • +6

    • +8

    Choose your answer

    41 mark

    Which equation for the reaction of the Period 3 non-metal oxides is not correct?

    • SO2 (g) + 2NaOH (aq) → Na2SO3 (aq) + H2O (l)

    • P4O10 (s) + 12NaOH (aq) → 4Na3PO4 (aq) + 6H2O (l)

    • P4O10 (s) + 12OH- (aq) → 4PO43-(aq) + 6H2O (l)

    • SO3 (g) + 2OH- (aq) → SO32- (aq) + H2O (l)

    Choose your answer

    51 mark

    Which of the following statements about the melting points of sodium oxide, magnesium oxide and aluminium oxide is correct?

    • The melting point of Al2O3 is the highest

    • The melting point of Na2O is lower than that of the MgO due to the difference in size and charge of the cations

    • Na2O has a higher melting point than MgO

    • The covalent character in Al2O3 leads to an increased melting point 

    Choose your answer

    11 mark

    Which element forms a covalent oxide that can react with a base?

    • Sodium

    • Magnesium

    • Phosphorus

    • Aluminium

    Choose your answer

    21 mark

    Which of the following is correct?

     

    Oxidation number of sulfur in SO3

    Oxidation number of silicon in CaSiO3

    A

    +4

    +6

    B

    +3

    +1

    C

    +4

    -4

    D

    +6

    +4

     

      Choose your answer

      31 mark

      Which of the following equations involving aluminium oxide is correct?

      • Al2O3 + HCl → AlCl3 + 3H2O

      • Al2O3 + H2O → Al(H2O)3(OH)3

      • Al2O3 + 2NaOH + 3H2O → 2NaAl(OH)4

      • Al2O3 + 6H2O → [Al(H2O)6]3+

      Choose your answer

      41 mark

      The period three oxide with the highest melting point is:

      • Aluminium oxide

      • Magnesium oxide

      • Silicon dioxide

      • Sodium oxide 

      Choose your answer

      51 mark

      Magnesium oxide and sodium oxide are both basic oxides of Period 3 elements. Which of the following is correct?

      • MgO has a pH 12

      • 3Na2O + P4O10 → 4Na3PO4

      • 6MgO + P4O10 → 2Mg3(PO4)2

      • Na2O has a pH of 10

      Choose your answer

      11 mark

      Which of the following statements about Period 3 and their oxides is correct?

      • Silicon dioxide is a white powder that when added to water creates an acidic solution

      • Magnesium burns in oxygen giving off a bright light and forming a basic oxide that can react with water to form a solution with a pH of 13

      • Sulfur burns in oxygen to form a colourless gas of which the molecules have a trigonal planar shape 

      • Sodium peroxide is formed during spontaneous combustion when sodium oxide reacts with oxygen 

      Choose your answer

      21 mark

      When sulfuric acid, H­2­SO­4, reacts with sodium hydroxide, two possible anions are formed.

      What is the bond angle in the shapes of these two anions?

      • 90°

      • 107°

      • 109.5°

      • 180°

      Choose your answer

      31 mark

      Phosphoric acid, P4O10, reacts with water to produce an oxyacid.

      What is the oxidation number of phosphorus in the oxyacid formed?

      • +4

      • +5

      • +6

      • +7

      Choose your answer

      41 mark

      An excess of magnesium oxide is reacted with phosphoric(V) acid.

      The correct balanced equation for the reaction is

      • MgO (s)  + H3PO4 (aq) → MgHPO4 (aq)  + H2O (l)

      • 3MgO (s)  + 2H3PO4 (l)  → Mg3(PO4)2 (aq) + 2H2O (l)

      • 6MgO (s) + P4O10 (s) → 2Mg3(PO4)2 (s)

      • 3MgO (s) + 2H3PO4 (aq)  → Mg3(PO4)2 (aq)  + 3H2O (l) 

      Choose your answer

      51 mark

      Sulfur dioxide reacts with water to form sulfuric(IV) acid.

      Which equation best represents the reaction that occurs once this product has been made?

      • SO2 + H2O ⇌ H+ + HSO3- 

      • SO2 + H2O ⇌ 2H+ + HSO3- 

      • SO2 + H2O ⇌ H2SO3

      • SO3 + H2O → H2SO4

      Choose your answer