CAIE A-Level Chemistry 10. Group 2 Question Bank

Practise Group 2 reactions, solubility and thermal trends using equations, observations, product predictions and comparative data.

[Maximum number: 4]

(a)

State what is observed when dilute hydrochloric acid is added to separate samples of barium oxide and barium carbonate.
barium oxide
barium carbonate

[ 2 ]

(b)

Write an equation for the reaction of strontium, Sr , with an excess of cold water.

[ 1 ]

$\mathrm{Sr}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Sr}(\mathrm{OH})_{2}+\mathrm{H}_{2}$

(c)

State the variation in solubility of the Group 2 sulfates down the group.

[ 1 ]

[Maximum number: 1]

Nitrogen and phosphorus are elements in Group 15 of the Periodic Table.

Nitrogen is found in inorganic compounds such as nitrogen oxides ( $\mathrm{NO}_{x}$ ), nitrates and nitric acid.

Describe what is seen when solid calcium nitrate is heated strongly.

[Maximum number: 3]

The reaction scheme shows some reactions of calcium.

(a)

Construct an equation for the thermal decomposition of $\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{~s})$ .

[ 1 ]

$\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \rightarrow \mathrm{CaO}+2 \mathrm{NO}_{2}+1 / 2 \mathrm{O}_{2}$

(b)

State the trend in the thermal stability of the Group 2 nitrates down the group.

[ 1 ]

(c)

Describe how $\mathrm{Ca}(\mathrm{OH})_{2}$ is used in agriculture.

[ 1 ]

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