Reactions in Aqueous Solution is one of 9 topics in the Grade 10 Physical Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. When an ionic compound dissolves in water, the process where its ions separate and become surrounded by water molecules is called:
Dissociation
Combustion
Sublimation
Neutralisation
Answer: Dissociation — Dissociation is the process by which an ionic compound's ions separate from the solid lattice and disperse throughout the water as free ions.
Easy
2. A substance that produces a solution capable of conducting electricity when dissolved in water is called a(n):
Electrolyte
Isotope
Precipitate
Catalyst
Answer: Electrolyte — An electrolyte is any substance that, when dissolved in water, produces a solution able to conduct electricity due to free-moving ions.
Medium
3. A solution of sugar dissolved in water does not conduct electricity, even though the sugar has fully dissolved. This makes sugar a:
Non-electrolyte
Strong electrolyte
Weak electrolyte
Precipitate
Answer: Non-electrolyte — Sugar dissolves without forming ions, so its solution contains no free-moving charged particles and cannot conduct electricity, making it a non-electrolyte.
