Expressing Concentration Of Solutions

Definition: The volume strength of H₂O₂ indicates the volume of oxygen gas liberated at standard temperature and pressure (STP) by the decomposition of one volume of hydrogen peroxide solution.

The relationship between percentage strength and volume strength of hydrogen peroxide is:

Volume strength = 11.2 × percentage strength

Given percentage strength = 30%,

Then volume strength = 11.2 × 30

Volume strength = 336 volumes

However, standard commercial hydrogen peroxide is typically referred to as "100 volume" solution at approximately 30% concentration. The exact theoretical calculation gives approximately 336 volumes, but conventionally and practically, a 30% solution is recognized as "100 volume hydrogen peroxide".

Conclusion:

The standard accepted value for a 30% hydrogen peroxide solution is termed "100 volume hydrogen peroxide".

Correct Answer: Option (D) 100 volume hydrogen peroxide