Final answer:
To rank substances by acidity (Milk, Vinegar, Lemon juice, Battery acid), pH values are referenced, with lower values being more acidic. Milk has the highest pH of around 6.5-6.7, followed by Vinegar, Lemon juice, and the most acidic, Battery acid (pH 0.3). The correct increasing order of acidity is Milk, Vinegar, Lemon juice, Battery acid.
The correct answer is options d) Milk, Vinegar, Lemon juice, Battery acid.
Step-by-step explanation:
The question asks to rank the listed substances in order of increasing acidity: Vinegar, Lemon juice, Milk, and Battery acid.
To rank these substances, one should look at their respective pH values. A lower pH value indicates a higher acidity.
Based on general knowledge and provided references:
- Milk, which is slightly acidic, has a pH around 6.5 to 6.7.
- Vinegar, which contains acetic acid, has a pH around 2.5.
- Lemon juice, containing citric acid, has a pH around 2.
- Battery acid, which is sulfuric acid, has a pH of approximately 0.3.
Therefore, the correct order from least to most acidic is as follows:
- Milk
- Vinegar
- Lemon juice
- Battery acid
Milk contains lactic acid which makes it slightly acidic but much less so than the other substances.
Both vinegar and lemon juice contain weak acids, but lemon juice is slightly more acidic than vinegar due to the presence of citric acid.
Battery acid is the most acidic due to its low pH and the strong nature of sulfuric acid.
The correct answer is options d) Milk, Vinegar, Lemon juice, Battery acid.