3.2.2 Group 2 the alkaline earth metals

Which substance is used to reduce titanium(IV) chloride in the extraction of titanium metal?

• Magnesium

• Manganese

• Vanadium

• Zinc

Which statement about barium sulfate is correct?

• It is soluble in water at a temperature of 100 °C.

• It is used in medicine because it does not dissolve in body fluids.

• It is a pale yellow solid.

• It reacts with acidified barium chloride solution.

Which compound is used to treat the symptoms of indigestion?

• MgO

• Mg(OH)2

• CaO

• Ca(OH)2

Which products are formed when magnesium reacts with steam?

• Magnesium hydroxide and hydrogen

• Magnesium hydroxide and oxygen

• Magnesium oxide and hydrogen

• Magnesium oxide and oxygen

Which of these decreases down Group 2?

• First ionisation energy

• Atomic radius

• Number of protons

• Reactivity with water

Sulfur dioxide (SO₂) is produced when some fossil fuels are burned.

Which of the following statements is true?

• Sulfur dioxide can be removed from waste gases in a power station by an acid-base reaction with calcium oxide.

• Sulfur dioxide is insoluble in water.

• Sulfur dioxide is a basic oxide.

• Sulfur dioxide is an ionic compound.

Which one of the following is a correct procedure for isolating a sample of hydrated copper(II) sulphate from a mixture of hydrated copper(II) sulphate and barium sulphate?

• filter, crystallise filtrate, dry the crystals

• filter, dry the solid on the filter paper

• add water, filter, dry the solid left on the filter paper

• add water, filter, crystallise filtrate, dry the crystals

Which one of the following is the electron arrangement of the strongest reducing agent?

• 1s² 2s² 2p⁵

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Which one of the following statements is correct?

• The first ionisation energies of the elements in Period 3 show a general decrease from sodium to chlorine.

• The electronegativities of Group 2 elements decrease from magnesium to barium.

• The strength of the intermolecular forces increases from hydrogen fluoride to hydrogen chloride.

• The ability of a halide ion to act as a reducing agent decreases from fluoride to iodide.

Which one of the following solutions would not give a white precipitate when added to barium chloride solution?

• silver nitrate solution

• dilute sulphuric acid

• sodium sulphate solution

• sodium nitrate solution