Question

Density of alkanes with increasing carbon atoms.

• A. increases
• B. decreases
• C. does not change

Answer 1

The correct option is A increases

Van der Waals force of attraction between the molecules increases with an increase in no. of carbon atoms. Thus, the molecules occupy less volume in comparison to increased mass. Density is inversely proportional to the volume occupied. Hence, the density of alkanes increases on increasing the no. of carbon atoms in alkanes.