MDCAT 2026 MCQs

Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.
More moles require more volume.

Each C=O bond is polar, but the molecule is linear and symmetric.
The bond dipoles cancel.

The ideal gas equation combines several gas laws.
It relates pressure, volume, amount, and absolute temperature.

Water has polar O-H bonds and a bent shape.
The bond dipoles do not cancel.

Low pressure keeps particles far apart.
High temperature reduces the relative importance of attractions.

Solid particles occupy fixed average positions.
They still vibrate about those positions.

Dalton's law treats each ideal gas independently.
Total pressure is the sum of partial pressures.

A liquid takes the shape of its container.
Its particles remain close but can flow past one another.

Particles move from regions of higher concentration toward lower concentration.
Diffusion occurs in gases, liquids, and solids.

A gas expands to fill its container.
Its particles are widely separated and move rapidly.

Effusion rates depend on molar mass.
Lighter gases generally effuse faster.

Sublimation bypasses the liquid phase.
Dry ice changing to carbon dioxide gas is an example.