Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Lemon juice
B
Baking soda solution
C
Distilled water
D
Olive oil
Understanding the Answer
Let's break down why this is correct
Answer
The liquid most likely to have a pH below 7 is vinegar, because it contains acetic acid. Acidic substances donate protons, lowering the pH value below 7. When universal indicator paper is dipped into vinegar, it turns red or orange, showing a pH around 2–3. For example, if you dip a strip into vinegar, the color shift confirms the acid’s low pH. Thus vinegar is the clear choice for a pH < 7.
Detailed Explanation
Lemon juice is an acid. Other options are incorrect because Many think baking soda is acidic because it tastes salty; Some believe water is acidic because it can dissolve acids.
Key Concepts
pH scale
Acidity and alkalinity
Universal indicator
Topic
pH Testing of Common Liquids
Difficulty
easy level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1Which of the following common liquids would likely have the highest pH level when tested, indicating it is more basic?
hardChemistry
Practice
2
Question 2Which of the following liquids would you classify as acidic based on its pH level when tested with universal indicator paper?
easyChemistry
Practice
3
Question 3Which of the following liquids are likely to have a pH less than 7, indicating they are acidic? Select all that apply.
easyChemistry
Practice
4
Question 4When measuring the acidity of a liquid using universal indicator paper, a lower pH value corresponds to a higher concentration of __________ ions.
mediumChemistry
Practice
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