What care should be taken while mixing acid with water?
Answer and explanation
Correct answer: Acid should be added slowly to water (अम्ल को धीरे-धीरे पानी में मिलाना चाहिए)
The governing concept is the exothermic nature of dilution. Mixing concentrated acid with water releases considerable heat. If water is poured quickly into a small quantity of acid, the water may heat suddenly, boil and throw corrosive acid droplets out of the container. Therefore the safe procedure is to add acid slowly to a larger volume of water while stirring and using protection, so option A is correct. The other choices are unsafe and violate laboratory practice.
Frequently asked questions
What is the correct answer to this question?
Acid should be added slowly to water (अम्ल को धीरे-धीरे पानी में मिलाना चाहिए)
Why is this the correct answer?
The governing concept is the exothermic nature of dilution. Mixing concentrated acid with water releases considerable heat. If water is poured quickly into a small quantity of acid, the water may heat suddenly, boil and throw corrosive acid droplets out of the container. Therefore the safe procedure is to add acid slowly to a larger volume of water while stirring and using protection, so option A is correct. The other choices are unsafe and violate laboratory practice.
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.
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