International ASChemistryEdexcelTopic Questions2. Energetics, Group Chemistry, Halogenoalkanes and Alcohols2.4 Groups 1 & 2

Groups 1 & 2 (Edexcel International AS Chemistry)

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11 mark

Which of these compounds does not produce a colour in a flame test, and produces an alkaline gas when warmed with sodium hydroxide solution?

  • Ca(OH)2

  • Mg(OH)2

  • NH4Cl

  • BeCl2

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11 mark

What is the ionic equation for the reaction between aqueous solutions of barium nitrate and sodium sulfate?

  • Na+ (aq) + N (aq) → NaNO3 (s)

  • 2Ba+ (aq) + Sstraight O subscript 4 superscript 2 minus end superscript (aq) → Ba2SO4 (s)

  • Na2+ (aq) + 2N (aq) → Na(NO3)2 (s)

  •  Ba2+ (aq) + Sstraight O subscript 4 superscript 2 minus end superscript (aq) → BaSO4 (s)

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21 mark

Data for some Group 1 and Group 2 cations are shown in the table.

Cation Ionic radius / nm Ionic charge
W 0.100 +2
X 0.138 +1
Y 0.113 +2
Z 0.149 +1

Which cation would be expected to form the nitrate with the greatest thermal stability?

  • W

  • X

  • Y

  • Z

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3
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Magnesium nitrate decomposes on heating.

2Mg(NO3)2 → 2MgO + 4NO2 + O2

What is the total volume of gas formed at room temperature and pressure (r.t.p.) when 0.005 mol of magnesium nitrate decomposes completely?

[Molar volume of a gas at r.t.p. = 24 000 cm3 mol−1]

  • 600 cm3

  • 300 cm3

  • 240 cm3

  • 120 cm3

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