ANS:D - both (b) and (c).

An intensive property is a physical or chemical property of a substance that does not depend on the size or amount of the substance in a system. In other words, intensive properties are independent of the system's mass or volume and are determined solely by the substance itself and its conditions. Examples of intensive properties include temperature, pressure, density, concentration, and chemical potential. Here's a closer look at each aspect:

1. Independent of Size or Amount: Intensive properties do not change when the size or amount of the substance changes. For example, the temperature of a substance remains the same regardless of whether you have a small sample or a large sample of the substance.
2. Determined by Substance and Conditions: Intensive properties are characteristic of the substance itself and its conditions. For instance, the density of a substance depends on its molecular structure, mass, and volume, as well as external factors such as temperature and pressure.
3. Examples of Intensive Properties:
   • Temperature: The average kinetic energy of the particles in a substance.
   • Pressure: The force exerted by a substance per unit area.
   • Density: The mass per unit volume of a substance.
   • Concentration: The amount of solute dissolved in a solvent, typically expressed as moles per liter (M).
   • Chemical Potential: The tendency of a substance to move or react in a system, depending on its composition and conditions.

Now, regarding the statement "force which drives the chemical system to equilibrium," it is not accurate to describe intensive properties in this way. While intensive properties such as chemical potential play a crucial role in driving chemical systems towards equilibrium, they are not forces in the traditional sense. Instead, they represent the inherent tendencies of substances to redistribute or react until equilibrium is reached, without directly exerting a physical force. In summary, intensive properties are fundamental characteristics of substances that do not depend on the size or amount of the substance and are determined by the substance itself and its conditions. They are essential for describing and understanding the behavior of systems in thermodynamics and chemistry.