A solution has pH close to 14. Why can touching it be dangerous?
Answer and explanation
Correct answer: It can be highly basic and caustic
The pH scale indicates acidity or basicity: 7 is approximately neutral, values below 7 are acidic, and values above 7 are basic. A pH close to 14 indicates a very high concentration of hydroxide ions and therefore a strongly alkaline solution. Such substances may be caustic and can damage skin or eyes. Option A is correct; the other choices conflict with the meaning of the pH value.
Frequently asked questions
What is the correct answer to this question?
It can be highly basic and caustic
Why is this the correct answer?
The pH scale indicates acidity or basicity: 7 is approximately neutral, values below 7 are acidic, and values above 7 are basic. A pH close to 14 indicates a very high concentration of hydroxide ions and therefore a strongly alkaline solution. Such substances may be caustic and can damage skin or eyes. Option A is correct; the other choices conflict with the meaning of the pH value.
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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