Which way of expressing concentration is commonly used in industrial chemical applications?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Mass percentage (w/w)
Mass percentage (w/w) is the concentration term commonly used in industrial chemical applications; a commercial bleaching solution, for example, is described as 3.62% sodium hypochlorite by mass. The other terms belong to other fields: w/V to medicine and pharmacy, V/V to a liquid in a liquid, and mole fraction to relating properties such as vapour pressure to composition.
NCERT (2026-27 edition):
Mass Percentage (w/w)
