Yr 11 Quiz 1 - Properties of matter

Which one of the following lists contains only pure substances?

• Water, molten iron, carbon dioxide gass

• Air, molten iron, copper(II) sulfate solution

• Salt, oxygen gas, iron(II) chloride solution

• Oxygen gas, nitrogen gas, air

A student is required to separate a mixture of charcoal and sugar. Which one of the following alternatives best summarises the method that would allow the separation of the mixture and retention of both components?

• Addition of water / Decantation / Crystallisation

• Addition of water / Filtration / Evaporation and crystallisation

• Sieving / Addition of water / Evaporation

• Sedimentation / Addition of water / Distillation

When a solution of barium nitrate is added to a solution of sodium sulfate, an insoluble white precipitate of barium sulfate is formed. The BEST way of separating the barium sulfate from the solution would be:

• evaporation

• distillation

• filtration

• crystallisation

Which one of the following does NOT contain homogenous substances?

• Carbon dioxide gas / Air

• A solution of copper(II) nitrate / Molten iron

• Oil and water / Sand and water

• A solder made from tin and lead / Water

Which one of the following techniques could not be used to separate two insoluble solids?

• Filtration

• Magnetic separation

• Sedimentation

• Sieving

The boiling temperatures of some gases found in air are given in the table above.

If a sample of liquid air containing all these gases at - 200'C is warmed, the first gas to distill from the mixture would be

• argon

• carbon dioxide

• nitrogen

• oxygen

A mixture of zinc oxide and wet sand weighs 11.62g. After drying, 2.53g of zinc oxide and 7.25g of sand remain. The percentage of water in the original mixture is closest to

• 15.8%

• 18.8%

• 25.4%

• 84.2%

The correct name for the compound with the formula MgBr₂ is

• magnesium bromine

• magnesium bromate

• magnesium bromite

• magnesium bromide

A compound of iron and oxygen has the formula Fe₂O₃. The correct name for this compound is

• iron(II) oxide

• iron trioxide

• iron(III) oxide

• iron oxide

The correct formula for sodium sulfate is

• Na₂S

• NaSO₃

• NaSO₄

• Na₂SO₄