When might a plot of ln[a] vs time not yield a straight line?

Considering a reaction:
A → B
The rate equation may be described as:
r = -k[A]ⁿ
Taking the natural log,
ln(r) = -nln([A]) + ln(k)
Therefore, the only time the graph of ln[A] vs time will be a straight line is when the order of the reaction is 0, meaning the reaction is independent of reactant concentration.

 A) density.

Explanation:

a) Density is defined as the mass contained per unit volume.

Density is an intensive property as it does not depend on the amount of substance.

b) Volume of the gas is defined as the space occupied by a substance.

c) Mass is the amount of matter contained in a substance.

d) Weight of an object is the force acting on an object by virtue of its mass. weight=

Volume, mass and weight are extensive properties as they all depend on the amount of substance present.