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WorksheetsGroup 2
Total questions: 14
Worksheet time: 9mins
Which properties of beryllium is typical of the Group 2?
Beryllium fluoride is ionic
beryllium chloride is covalent
beryllium oxide is amphoteric
beryllium hydroxide is amphoteric
Which of the following Group 2 elements is likely to form complex ion?
Beryllium
Magnesium
Calcium
Strontium
Mg(OH)2 is thermally more stable than MgCO3. Which is true about this statement?
OH- ion is bigger than CO32- ion.
OH- ion is less polarisable than CO32- ion.
Enthalpy of formation of Mg(OH)2 is more negative than MgCO3.
The ionic bond of Mg(OH)2 is stronger than MgCO3.
Be(OH)2 decomposes to BeO when heated to 138oC. Which statement explains why Be(OH)2 decomposes at such a temperature?
Be2+ ion is small
Be2+ ion has high charge density.
The O-H bond in Be(OH)2 is polar.
BeO is a covalent compound.
Which equations correctly shows the reaction that occur when magnesium nitrate is heated strongly?
Mg(NO3)2 → Mg(NO2)2 + O2
Mg(NO3)2 → MgO +N2O + O2
Mg(NO3)2 → MgO+ +2NO2 + 21 O2
Mg(NO3)2 → MgO2 +2NO+ O2
The solubility of Group 2 sulphates decreases descending the group. what information can we obtain from this observation?
The reducing power of the element increases.
The standard enthalpy of solution becomes more endothermic.
The sulphates are stable to heat.
The Ksp of the elements decreases.
Calcium chloride is soluble in water whereas calcium fluoride is not because
calcium fluoride is a covalent compound
the lattice energy of calcium fluoride is very exothermic
fluorine is more reactive than chlorine
the charge density of the Ca2+ ion in CaF2 is higher than CaCl2
When aqueous X is added to aqueous Y, a white precipitate is formed immediately. What are X and Y?
X : magnesium chloride
Y: sodium sulphate
X: Barium nitrate
Y: Potassium nitrate
X: Barium chloride
Y: Sodium sulphate
X:Barium nitrate
Y:Ammonia
Which of the following anhydrous magnesium compounds loses mass when heated?
magnesium oxide
magnesium chloride
magnesium nitrate
magnesium nitrite
Which of the following elements show a constant oxidation state in all its compounds?
oxygen
nitrogen
chlorine
magnesium
The group 2 carbonates decomposes according to the equation:
MCO3(s) → MO(s) + CO2(g)
Which of the following is true about lattice energy of MCO3, lattice energy of MO and decomposition temperature?
LE MCO3 : increases
LE of MO: increases
Decomposition temperature: Increases
LE MCO3 : unchanged
LE of MO: unchanged
Decomposition temperature: unchanged
LE MCO3 : decreases
LE of MO: decreases
Decomposition temperature: Increases
LE MCO3 : increases
LE of MO: decreases
Decomposition temperature: decreases
Aqueous barium(II) ions are highly poisonous. However, barium sulphate can be safely ingested but not barium carbonate. This is because
barium sulphate thermally stable
barium sulphate is less soluble than barium carbonate
barium carbonate dissolves in acid
barium carbonate is soluble in water
Group 2 elements and their compound give characteristics flame test. Which of the following combination is true about the colour of the flame.
Mg: Brilliant white
Calcium: Apple green
Strontium: Brick red
Barium: Crimson
Going down Group 2,
the carbonates become more stable
the sulphate become more soluble
the nitrate become less stable
the solubility of the hydroxides decreases
