Between two basic solutions of pH 10 and pH 13, which one is more basic?
Answer and explanation
Correct answer: The one with pH 13
On the pH scale, values above 7 indicate basic solutions, and a higher pH generally means a lower hydrogen-ion concentration and greater basicity. Since 13 is greater than 10, the pH 13 solution is more basic. The three-unit difference also corresponds to a thousand-fold difference in hydrogen-ion concentration under comparable conditions. Options C and D incorrectly call the solutions acidic or neutral, so option B is correct.
Frequently asked questions
What is the correct answer to this question?
The one with pH 13
Why is this the correct answer?
On the pH scale, values above 7 indicate basic solutions, and a higher pH generally means a lower hydrogen-ion concentration and greater basicity. Since 13 is greater than 10, the pH 13 solution is more basic. The three-unit difference also corresponds to a thousand-fold difference in hydrogen-ion concentration under comparable conditions. Options C and D incorrectly call the solutions acidic or neutral, so option B 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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