Question detail
For The pH scale and neutralisation, which acid-base focus answer best supports this Unit 4.4 objective: Describe universal indicator and pH meters as methods for measuring pH?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactions of acids
Question
- A. By detecting hydrogen ion concentration - correct acid-base focus for universal indicator
- B. Wrong acid-base focus: confuses universal indicator with a nearby Unit 4.4 chemical change idea
- C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for The pH scale and neutralisation
- D. Wrong reaction link: does not support Describe universal indicator and pH meters as methods for measuring pH
Answer
The correct option is By detecting hydrogen ion concentration - correct acid-base focus for universal indicator.
Explanation
The correct option is "By detecting hydrogen ion concentration - correct acid-base focus for universal indicator" because it supports the approved learning objective: Describe universal indicator and pH meters as methods for measuring pH. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for The pH scale and neutralisation.
Common mistake
Misunderstanding pH Measurement Methods
Students often confuse the use of universal indicators and pH meters, thinking they measure pH in the same way.
Clarify that universal indicators provide a color change to indicate pH levels, while pH meters give a numerical value for pH directly.
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