Pakistan MCQs

A triple bond contains one axial sigma bond.
Two perpendicular pi bonds complete the bond order of three.

Viscosity arises from internal friction.
It usually decreases for liquids as temperature increases.

Hydrogen bonding is stronger than ordinary dipole forces.
It strongly affects boiling point and solubility.

For a fixed gas sample at constant temperature, PV is constant.
Compression increases pressure.

Dispersion forces occur in all atoms and molecules.
Their strength generally increases with polarizability.

Gas volume rises with kelvin temperature at fixed pressure.
Temperature must be on an absolute scale.

Polar molecules align partially positive and negative regions.
These attractions affect physical properties.

Heating a fixed-volume gas raises pressure.
The relationship uses absolute temperature.

Hydrogen bonds require significant energy to overcome.
This raises water's boiling point relative to similar-size molecules.

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.