From Models to Materials · Paper 1 — Free Chemistry SL Practice Questions

A student compares the three states of matter. Which row correctly describes the typical particle separation and motion in each state?

Three samples of the same pure molecular substance are at different temperatures: Sample X is a solid, Sample Y is a liquid, and Sample Z is a gas. Which statement correctly describes the relative effect of intermolecular forces on particle arrangement across the three samples?

Three liquid compounds — butane ($\text{C}_4\text{H}_{10}$), propanal ($\text{C}_3\text{H}_6\text{O}$), and propan-1-ol ($\text{C}_3\text{H}_8\text{O}$) — are compared at room temperature. Which option correctly ranks these liquids in order of increasing boiling point?

A sealed syringe contains gaseous ammonia, $\text{NH}_3$, at constant temperature. The plunger is pushed in, halving the volume. Which statement correctly describes the ammonia particles after compression?