AKU MBBS MCQs

A vector has both magnitude and direction.
Acceleration describes the rate and direction of velocity change.

An element cannot be broken down chemically into simpler substances.
Each element is identified by its atomic number.

Both sides of a valid physical equation must have the same dimensions.
Dimensional analysis can reveal inconsistent formulas.

Compounds have definite formulas and characteristic properties.
Their components can be separated only by chemical means.

The newton is derived from base units as kg·m/s².
Metre, kilogram, and second are base units.

Mixture components retain much of their individual identity.
They can often be separated by physical methods.

Solutions are homogeneous mixtures.
Any sampled portion has approximately the same composition.

Heterogeneous mixtures contain distinguishable regions or phases.
Examples include sand in water and granite.

A physical change alters form or state without changing chemical identity.
Ice and liquid water are both H2O.

Rusting forms new iron oxide substances.
Chemical changes involve rearrangement of atoms and new products.

Density describes how much mass is packed into a volume.
It is commonly expressed in g/cm³ or kg/m³.

The mole is the SI base unit for amount of substance.
One mole contains Avogadro's number of specified entities.