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

Calcium carbonate, calcium hydroxide and calcium oxide...

• are used in agriculture to decrease the pH of soil

• are used in agriculture as a pesticide

• are used in agriculture to fertilise the soil

• are used in agriculture to increase the pH of soil

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

Reactivity of group 2 metals increases down the group because...

• electrostatic attraction between +ve ions and delocalised electrons decreases

• shielding effect decreases down the group

• outer electrons are further away from the nucleus so metals easily oxidise

• melting point decreases down the group so electrons are easily lost

Group 2 metals are strong reducing agents. Reducing power............. down the group.

• increases

• decreases

• is constant

• varies

Which statement shows the correct flame colours of the group 2 metals burning in oxygen?

• Mg burns bright white, Ca and Sr burns red and Ba burns blue

• Mg burns bright yellow, Ca and Sr burns red and Ba burns blue

• Mg burns bright yellow, Ca and Sr burns red and Ba burns blue

• Mg burns bright white, Ca and Sr burns red and Ba burns green

Which group II metals does not react with water but reacts with steam

• Be

• Mg

• Ca

• Sr

Which group II metals react with water to produce a white ppt?

• Be and Mg

• Ca only

• Mg and Ca

• Mg only