An aqueous solution feels soapy and shows pH 12. Why can touching it directly be dangerous?
Answer and explanation
Correct answer: It may be strongly basic and caustic
A pH of 12 is far above neutral pH 7 and indicates a strongly basic solution. The slippery or soapy feel is also consistent with an alkali, but it must not be used as a safety test. Concentrated or sufficiently strong bases can break down skin oils and damage tissue, causing irritation or chemical burns. Therefore direct contact is unsafe and protective equipment is needed. Option A is correct.
Frequently asked questions
What is the correct answer to this question?
It may be strongly basic and caustic
Why is this the correct answer?
A pH of 12 is far above neutral pH 7 and indicates a strongly basic solution. The slippery or soapy feel is also consistent with an alkali, but it must not be used as a safety test. Concentrated or sufficiently strong bases can break down skin oils and damage tissue, causing irritation or chemical burns. Therefore direct contact is unsafe and protective equipment is needed. 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.
