The following table shows the pH values of four solutions A, B, C and D on a pH scale. The solutions A, B, C and D respectively are of a
The following table shows the pH values of four solutions A, B, C and D on a pH scale. The solutions A, B, C and D respectively are of a
Options
Weak acid, neutral, weak base, strong base
Marking Scheme
- 1pH scale
- 2acidic
- 3neutral
- 4basic
Hint
Use the pH scale to determine the nature of each solution.
Quick Oral Answer
The pH scale is a measure of the concentration of hydrogen ions in a solution. A pH of 7 is neutral, while a pH less than 7 is acidic and a pH greater than 7 is basic. Based on the pH values given in the table, we can determine the nature of each solution. Solution A has a pH of 4, which is acidic. Solution B has a pH of 7, which is neutral. Solution C has a pH of 9, which is basic. Solution D has a pH of 12, which is also basic. Therefore, the correct order of the solutions is weak acid, neutral, weak base, strong base.
Analysis & Explanation
The pH scale is a measure of the concentration of hydrogen ions in a solution. A pH of 7 is neutral, while a pH less than 7 is acidic and a pH greater than 7 is basic. Based on the pH values given in the table, we can determine the nature of each solution. Solution A has a pH of 4, which is acidic. Solution B has a pH of 7, which is neutral. Solution C has a pH of 9, which is basic. Solution D has a pH of 12, which is also basic. Therefore, the correct order of the solutions is weak acid, neutral, weak base, strong base.
Common Mistakes
- 1confusing pH values with acidity/basicity
- 2not using the pH scale correctly
Interesting Facts
The pH scale was developed by Søren Sørensen in 1909.
The pH scale is used to measure the acidity/basicity of solutions.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 1 mark in the CBSE Class 10 Science 2025 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "pH scale" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.