Which of the following is not a property of hydrogen peroxide?

Let's break down the properties:
- (A) It is immiscible in water:
This statement is not true. Hydrogen peroxide \(\left(\mathrm{H}_2 \mathrm{O}_2\right)\) is miscible in water. In fact, it is very soluble in water and forms a homogenous mixture with it. Hydrogen peroxide is commonly found in aqueous solutions, such as the \(3 \%\) solution commonly used for disinfecting and bleaching.
- (B) It is a pale blue colored liquid in pure state:
This statement is true. In its pure form, hydrogen peroxide is a pale blue-colored liquid. However, it is typically stored in a diluted form (around 3-10\%) for safety and convenience.
- (3) Its strength is explained in volume unit:
This statement is true. The concentration or strength of hydrogen peroxide solutions is often expressed in terms of "volume" (e.g., 10-volume hydrogen peroxide means the solution will release 10 times its volume of oxygen gas when it decomposes). This unit of measurement is related to the volume of oxygen gas released upon decomposition.
- (4) It is a mild oxidizing as well as reducing agent:
This statement is true. Hydrogen peroxide can act as both an oxidizing agent (by donating oxygen) and a reducing agent (by accepting oxygen or hydrogen). This dual nature makes it a versatile chemical in various reactions.