Question

Among the following an intensive properties are:
A. Boiling point
B. Entropy
C. pH
D. EMF of a cell

Answer 1

Hint: Intensive property means it is a bulk property. Intensive property is not going to depend on the amount of the substance or size of the substance present. Intensive property does not change with the substance. It is a physical property.

Complete step by step answer:
- We have to find the intensive property among the given options.
- Intensive property is a physical property but not depends on the size or mass of the substance.
- Coming to the given options, option A, Boiling point. Boiling point is an intensive property because for 1 mole of water or for 1000 moles of water the boiling point is the same. So, option A is correct.
- Coming to option B, Entropy. Entropy is not an intensive property because the amount of substance increases, entropy increases. But intensive property does not change with the amount of substance. So, option B is wrong.
- Coming to option C, pH. It is also an intensive property because for 1 ml or for 100 ml the pH will be the same. So, option C is also correct.
- Coming to option D, EMF of cell. It is also an intensive property. EMF of the cell won’t change with the amount of the electrolyte and amount of the electrode. So, option D, also correct.
- Therefore the intensive properties are Boiling point, pH, EMF of a cell among the given options.
So, the correct answer is “Option A,C and D”.

Note: Extensive property is going to depend on the amount or size of the substance present. For example entropy is an extensive property. As the amount of the substance increases entropy also increases. So, entropy is an extensive property.