If an aqueous solution has pH close to 14, what careful conclusion should be taken while handling it?
Answer and explanation
Correct answer: It may be highly basic and caustic
On the usual aqueous pH scale, values near 14 indicate a very high concentration of hydroxide ions and strong basic character. Such a solution may be caustic, meaning it can damage skin, eyes, or other tissues. The pH value alone does not make a substance pure, edible, or acidic, so careful handling with goggles, gloves, and proper laboratory practice is required. Therefore A is correct; B, C, and D contradict the meaning of high pH.
Frequently asked questions
What is the correct answer to this question?
It may be highly basic and caustic
Why is this the correct answer?
On the usual aqueous pH scale, values near 14 indicate a very high concentration of hydroxide ions and strong basic character. Such a solution may be caustic, meaning it can damage skin, eyes, or other tissues. The pH value alone does not make a substance pure, edible, or acidic, so careful handling with goggles, gloves, and proper laboratory practice is required. Therefore A is correct; B, C, and D contradict the meaning of high pH.
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.
