Why did the risk increase when a student added water to acid for dilution?
Answer and explanation
Correct answer: Because dissolving acid can release heat and cause splashing
The governing safety principle is that dilution of concentrated acid is exothermic. If a small amount of water is poured into a larger volume of acid, the water can heat suddenly, boil locally, and eject corrosive acid droplets. The safe laboratory practice is to add acid slowly to a larger quantity of water while stirring. Therefore option A explains the increased risk; the other choices describe impossible or chemically unrelated effects.
Frequently asked questions
What is the correct answer to this question?
Because dissolving acid can release heat and cause splashing
Why is this the correct answer?
The governing safety principle is that dilution of concentrated acid is exothermic. If a small amount of water is poured into a larger volume of acid, the water can heat suddenly, boil locally, and eject corrosive acid droplets. The safe laboratory practice is to add acid slowly to a larger quantity of water while stirring. Therefore option A explains the increased risk; the other choices describe impossible or chemically unrelated effects.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
