Which of the following is acidic in nature ?

Options

A. Lime juice
B. Human blood
C. Lime water
D. Antacid

Explanation

To determine which of the given options is acidic in nature, we will analyze each option based on their chemical composition and pH levels.

### Step-by-Step Solution:

1. **Identify the Options**: We need to consider the options provided in the question. Let's assume the options are lime juice, human blood, lime water, and antacid.

2. **Analyze Lime Juice**:
- Lime juice contains citric acid, which is a weak organic acid.
- The pH of lime juice is typically less than 7, indicating that it is acidic in nature.

3. **Analyze Human Blood**:
- Human blood has a pH of approximately 7.4, which is slightly above 7.
- Since the pH is greater than 7, human blood is basic in nature.

4. **Analyze Lime Water**:
- Lime water is a solution of calcium hydroxide (Ca(OH)₂).
- Calcium hydroxide is a strong base, and therefore, lime water is basic in nature.

5. **Analyze Antacid**:
- Antacids typically contain compounds like magnesium hydroxide or aluminum hydroxide.
- These compounds are also basic and are used to neutralize excess stomach acid, confirming that antacids are basic in nature.

6. **Conclusion**:
- After analyzing all the options, we find that the only option that is acidic in nature is lime juice, which contains citric acid.

### Final Answer:
**Lime juice is acidic in nature.**

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