SENIO ONE ONLINE CHEMISTRY TEST TWO

Which one of the following is a basic oxide?
1. SO₂
2. ZnO
3. P₂O₅
4. CaO
Beginning with the least reactive, the order of reactivity of the following metals with dilute hydrochloric acid is
1. iron, aluminium lead, zinc
2. zinc, lead, aluminium, iron
3. lead, iron, zinc, aluminium
4. aluminium, zinc, iron, lead
Which one of the following substances conducts electricity?
1. Zinc
2. Neon
3. Chlorine
4. Sulphur
Which one of the following gases is an oxidizing agent?
1. Hydrogen
2. Water vapour
3. Argon
4. Oxygen
A separating funnel can be used to separate a mixture of water and petrol because the two liquids.
1. are miscible
2. are immiscible.
3. have different densities.
4. have different boiling points.
The process by which water is changed into steam is called
1. distillation
2. efflorescence
3. condensation
4. evaporation
Which of the following mixtures is best separated by chromatography?
1. Ink
2. Crude petroleum
3. Water and oil
4. Water and ethanol
The gas produced when steam is passed over heated iron filings is
1. O₂
2. N₂O
3. H₂
4. NO
Rust is hydrated
1. iron (II) oxide
2. iron (II) oxide
3. iron (III) oxide
4. iron (III) hydroxide
Brass is an alloy of
1. tin and copper
2. lead and copper
3. zinc and copper
4. aluminium and copper
Which one of the following mixtures is best separated by using a separating funnel?
1. Oil and water
2. Sugar and water
3. Ethanol and water
4. Sand and water
Which one of the following substances can be purified by sublimation?
1. Sulphur
2. Phosphorous
3. potassium Chloride
4. Ammonium Chloride
The main components of air are
1. oxygen and nitrogen
2. oxygen and hydrogen
3. nitrogen and carbon dioxide.
4. nitrogen and noble gases
Which one of the following substances undergoes a chemical reaction when heated?
1. Ice
2. Argon
3. Iodine
4. Sulphur
An oxide of metal Z reacts with magnesium when heated but it does not react with copper. The order of reactivity of Z, magnesium and copper starting with the most reactive is
1. Cu, Z, Mg
2. Z, Mg, Cu
3. Mg, Cu, Z.
4. Mg, Z, Cu
Which one of the following substances sublimes when heated?
1. ZnO
2. CaCI₂
3. I₂
4. P
The red brown coating formed when iron nail is left in moist air for a long time is
1. hydrated iron (II) oxide
2. hydrated iron (III) oxide
3. anhydrous iron (II) oxide
4. anhydrous iron (III) oxide
Which one of the following methods is normally used to prepare hydrogen in the laboratory?
1. Electrolysis of water.
2. Action of water on magnesium
3. Action of dilute hydrochloric acid on zinc.
4. Action of steam on zinc.
The alloy solder consists of
1. zinc and lead
2. copper and lead
3. copper and aluminium
4. tin and lead.
Which one of the following metals will not displace lead from its salt in solution?
1. Aluminium
2. Calcium
3. Silver
4. Zinc

SENIO ONE ONLINE CHEMISTRY TEST TWO

Quiz