If a small amount of acid falls on the skin, what should be the first safe step in the laboratory?
Answer and explanation
Correct answer: Wash the affected area with plenty of water
The governing safety principle is immediate dilution and removal of a corrosive chemical. The affected skin should be washed at once with a large amount of running water, while contaminated clothing is removed if appropriate and laboratory supervision or medical help is sought. Water reduces the acid concentration and carries it away. Adding a strong base can cause another corrosive reaction and heat, rubbing spreads damage, and doing nothing is unsafe. Hence option A is correct.
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What is the correct answer to this question?
Wash the affected area with plenty of water
Why is this the correct answer?
The governing safety principle is immediate dilution and removal of a corrosive chemical. The affected skin should be washed at once with a large amount of running water, while contaminated clothing is removed if appropriate and laboratory supervision or medical help is sought. Water reduces the acid concentration and carries it away. Adding a strong base can cause another corrosive reaction and heat, rubbing spreads damage, and doing nothing is unsafe. Hence option A is correct.
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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