FUTO Chemistry 2018/2019 - Model 2 Past Questions

Practice each question, then open it to see the full details.

The ores that can be concentrated by flotation are

A.nitride ores
B.sulphide ores
C.oxide ores
D.chloride ores

In a flame test for calcium, the flame appears.

A.green when viewed through a blue glass
B.blue when viewed through a blue glass
C.orange-red when viewed through a blue glass
D.brick-red when viewed through a blue glass

What is the molar mass of a substance, if 0.4 mole of the substance has a mass of 25.0g?

A.6.3g
B.40.0g
C.62.5g
D.2.5g

Which of these properties gives a solid its definite shape?

A.Strong intermolecular attraction
B.High melting point
C.High boiling point
D.Weak intermolecular attraction

The gas that can be dried using concentrated tetraoxosulphate (VI) acid is

A.hydrogen bromide
B.sulphur (IV) oxide
C.hydrogen sulphide
D.ammonia

Which of the following alloys contain iron?

A.Duralumin and steel
B.Brass and bronze
C.Steel and permalloy
D.Soft solder and duralumin

The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is

A.Sublimation → Dissolution → Filtration → Evaporation
B.dissolution -> dryness -> filtration--> evaporation
C.filtration -> sublimation -> evaporation-->dryness
D.dissolution --> filtration --> sublimation--> evaporation

A substance that is used as a ripening agent for fruits is

A.ethene
B.propene
C.methane
D.butane

The solubility curve shows the variation of solute concentration with

A.volume
B.temperature
C.vapour density
D.pressure

When 50cm³ of a saturated solution of sugar of molar mass 342g at 40°C was evaporated to dryness, 34.2g of dry solid was obtained. The solubility of sugar at 40°C is

A.7.0 mol dm^-3
B.3.5 mol dm^-3
C.2.0 mol dm^-3
D.10.0 mol dm^-3