SENIOR ONE ONLINE CHEMISTRY TEST THREE

When pollen grains are placed in water in a trough and observed under a microscope, the grain particles will be seen to
1. all remain stationary
2. all move randomly
3. Stick together in a cluster
4. all move in one direction.
Which one of the following does not involve a change in mass when heated in air?
1. Potassium permanganate
2. Copper (II) hydroxide
3. Zinc oxide
4. Copper
Which one of the following properties is not true about oxygen gas?
1. It is colorless
2. It is neutral
3. It is odorless
4. It is a reducing agent
Which one of the following is NOT a characteristic of metals?
1. Conduct electricity
2. Conduct heat.
3. Their atoms form cations.
4. Their atoms form anions
Which one of the following statements is false about the kinetic theory of gases?
1. Gas molecules consist of tiny particles.
2. Gas particles collide with one another.
3. Gas particles are in a state of continuous motion.
4. There are large forces of attraction between gas particles.
Which pair of the mixtures below can be separated by sublimation?
1. Sodium chloride and lead (II) chloride.
2. Copper (II) chloride and zinc nitrate.
3. Zinc sulphate and lead (II) nitrate.
4. Ammonium chloride and zinc chloride,
The most efficient method for separating a mixture of copper (II) sulphate and lead (II) sulphate is by dissolution followed by
1. decantation.
2. sublimation,
3. filtration.
4. crystallization.
The process of making steel from iron is called
1. galvanization.
2. metal plating.
3. glazing.
4. alloying.
The substance that will not sublime when heated is
1. sulphur.
2. ammonium chloride
3. iron (III) chloride.
4. iodine.
Metal P displaces hydrogen from a dilute acid but metal Q does not. Metal R displaces P from its chloride. The order of reactivity of the metals beginning with the most reactive is
1. P, Q, R
2. Q, P, R
3. R, Q, P
4. R, P, Q
A separating funnel is used in the laboratory to separate
1. Sand from water
2. Sulphur from Iron
3. Water from ethanol
4. Water from paraffin
Air contains mainly
1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Water vapour
Which one of the following pairs of substances will react to form hydrogen?
1. copper and dilute sulphuric acid
2. magnesium and dilute hydrochloric acid
3. copper (II) carbonate and dilute sulphuric acid
4. sodium sulphite and dilute hydrochloric acid
Which one of the following mixtures can be separated by filtration?
1. sugar and water
2. ink and water
3. Sulphur and iron
4. Sand and salt
When a solid is heated it changed to gas without passing through the liquid state. This change of state is called
1. Evaporation
2. distillation
3. Condensation
4. sublimation
Which one of the following are the raw materials used to manufacture hydrogen gas on a large scale?
1. Zinc and dilute sulphuric acid
2. Iron and water
3. Carbon and water
4. Calcium and water
Which one of the following substances is deliquescent?
1. calcium hydroxide
2. sodium hydroxide
3. magnesium hydroxide
4. zinc hydroxide
. Which one of the following processes decreases the concentration of carbon dioxide in the atmosphere?
1. Rusting
2. Combustion
3. Photosynthesis
4. Respiration
The main components of air are
1. Oxygen and nitrogen
2. Oxygen and Hydrogen
3. Nitrogen and Carbon dioxide
4. Nitrogen and the noble gases
Metals burn in air to form:
1. basic oxides
2. acidic oxides
3. amphoteric oxides
4. acid anhydrides

SENIOR ONE ONLINE CHEMISTRY TEST THREE

Quiz