Group 2 (EASE Past Papers)

The table compares calcium and barium, and calcium carbonate with barium carbonate.

Which row is correct?

• A

• B

• C

• D

X is Group 2 metal. It forms a hydroxide which is more soluble than calcium hydroxide. It forms a sulfate which is more soluble than barium sulfate.

What could be the identity of X?

1. 1. Strontium

2. 2. Beryllium

3. 3. Magnesium

• 1 only

• 2 only

• 3 only

• 1 and 2

Which statement about the elements barium and calcium and their compounds are correct?

1. 1. Barium nitrate decomposes at higher temperature than calcium nitrate.

2. 2. Barium hydroxide is more soluble in water than is calcium hydroxide.

3. 3. Calcium is more reactive with water than is barium.

• 1, 2 and 3

• 1 and 2

• 2 and 3

• 1 only

The Group 2 metals burn in air, and burn more rapidly in oxygen gas. The metals form white solid oxides. For example, magnesium ribbon burns with a bright white flame once it is ignited in a Bunsen flame.

Which of the following shows the chemical reacions of the burning of magnesium metal?

What are the products of Group 2 oxides react with dilute acids?

• metal and hydrogen gas

• metal and water

• salt and hydrogen gas

• salt and water

What happens when a piece of magnesium ribbon is placed in cold water?

• A vigorous effervescence occurs.

• Bubbles of gas form slowly on the magnesium.

• The magnesium floats on the surface of the water and reacts quickly.

• The magnesium glows and a white solid is produced.

A flame test is a qualitative analysis used by the chemist to identify the metal ion present in the sample. Not all metal ions emit colour when heated in the gas burner. However, for Group 2 metal elements, they emit colour when a solution containing their metal ion is burned.

Which Group 2 elements emit red/scarlet colour in flame test?

• Magnesium

• Calcium

• Strontium

• Barium

Which statements correctly describe a trend on going down Group 2?

1. 1. Reactivity of the elements increases.

2. 2. First ionisation energy of the elements decreases.

3. 3. The hydroxides become more soluble in water.

• 1, 2 and 3

• 1 and 2

• 2 and 3

• 1 only

Which row of the table gives correct comparisons between the solubilities of calcium and barium hydroxide and the thermal stabilities of calcium and barium carbonate?

• A

• B

• C

• D

Radium is an element below barium in Group 2 of the Periodic Table.

Which equation shows what happens when solid radium nitrate, Ra(NO₃)₂, is heated strongly?