Question

Intensive properties among the following is/are:
(A) Refraction index
(B) Volume
(C) Length
(D) Mass

Answer 1

The physical properties of substance and systems are of two types that are extensive properties and intensive properties. Extensive properties are those which depend on amount or size of matter but intensive properties do not depend on size or amount of matter.

Complete step by step answer:
Before answering the question, we first need to know a little more about extensive and intensive properties.
1. Extensive properties:
Extensive properties are those whose magnitude is additive for subsystems, because these properties can decrease or increase as they grow small and large respectively.
The Extensive properties depend upon size and amount of substance.
For example, mass, mass of any substance depends upon the amount of that substance. Thus, mass is an Extensive property.

2.Intensive properties:
The value of this property does not depend upon the size or amount of matter present in the substance
For example, Temperature, temperature have no relation with the size or amount of that substance.
From the given options, (B) volume, (C) length and (D) mass, three of them depend upon the size and amount of matter in the substance. But (A) refractive index does not depend upon size or amount of matter.
Therefore, volume, mass and length are extensive properties. Whereas, refractive index is an intensive property.
Hence, the correct option is (A) Refractive index.

Note:
These extensive and intensive properties of a substance help in determining the state of a simple compressible system,
When one property is divided by another, it gives an intensive property.
For example, $\dfrac{{{\text{mass}}}}{{{\text{volume}}}} = {\text{density}}$
Mass and volume are extensive properties but on division. They give density which is an intensive property.