Waec Model Questions Vol1 2023 Chemistry Question 3

Practice practical question 3 from the 2023 Waec Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding .

Waec Model Questions Vol1 2023 Chemistry Practical
Topic: Chemical Bonding
Question 3 WAEC_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • practical

Three unknown solid compounds labelled X, Y and Z are subjected to the qualitative tests listed below. Observations: - Compound X: dissolves readily in water forming a clear solution; the solution conducts electricity strongly; on evaporation a white crystalline solid precipitates. - Compound Y: does not dissolve in water; does not conduct electricity; melts at about 150 °C with a faint odor. - Compound Z: a shiny metallic solid that does not dissolve in water but conducts electricity when a piece is placed between the terminals of a circuit. Using the observations, answer the questions that follow.

Question Parts

( a )
State the predominant type of chemical bonding in each of the compounds X, Y and Z.
( b )
Write a balanced chemical equation for the formation of compound X from its constituent elements in their standard states.
( c )
Suggest one source of experimental error that could lead to an incorrect conclusion about the bonding type of compound Y and propose a method to minimise it.
( d )
i) Explain why the conductivity test is a reliable indicator of ionic bonding. ii) Explain why metallic bonding exhibits electrical conductivity in the solid state.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Waec Model Questions Vol1 2023 Chemistry Question 3. It is one of the practical questions from the 2023 Waec Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding .

View More Waec Model Questions Vol1 2023 Chemistry Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support