MCQ Questions

Question No. 1

Give one term for the following descriptions:

Answer :

a) Solutions that conduct electricity

b) Negative ions

c) The particles in a non-electrolyte

d) The table that contain reduction half-reactions

e) The reference electrode that is used to measure electrode potential.

Question No. 2

Why does tap water conduct electric current, but distilled water does not?

Answer :

Question No. 3

Which of the reactions will happen? Give a reason for your answer.

Answer :

a) 2Li + 2H₂O → 2LiOH + H₂

b) 2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag

c) Hg + H₂SO₄ → HgSO₄ + H₂

d) Fe + ZnCl₂ → FeCl₂ + Zn

Question No. 4

A student conducts an experiment to determine if sodium chloride is a conductor.

Answer :

a) Will a solid salt crystal conduct an electric current? Explain your answer.

b) What should he do to make an electrolyte from sodium chloride?

c) Make a labelled sketch of the apparatus that he will use to determine how good an electrolyte a sodium chloride solution is. Use the following labels: battery, light bulb, ammeter, cathode, anode, electrolyte, connecting wires.

d) Show the polarity of the battery

Question No. 5

Study the following list of substances: kerosene, fused lead(II) bromide, carbonic acid, copper(II) sulphate solution, sugar solution, molten table salt, cooking oil, ammonia solution

Answer :

a) Define the terms strong electrolyte, weak electrolyte and non-electrolyte

b) Name all the strong electrolytes in the list

c) Name all the weak electrolytes in the list

d) Name all the non-electrolytes in the list

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