Solution with pH less than 7 is
- Sodium chloride solution
- Sodium hydroxide solution
- Acetic acid solution
- Slaked lime
The Correct Option is C
Solution and Explanation
To solve the problem, we need to identify which solution has a pH less than 7.
1. Understanding pH Values:
- A solution with a pH less than 7 is acidic.
- A solution with a pH greater than 7 is basic.
- A solution with a pH of 7 is neutral (like pure water).
2. Analyzing the Given Solutions:
- Sodium chloride solution: Sodium chloride (NaCl) in water dissociates into sodium (Na+) and chloride (Cl-) ions, which do not affect the pH significantly. This solution is neutral, so its pH is 7, not less than 7.
- Sodium hydroxide solution: Sodium hydroxide (NaOH) is a strong base and will have a pH greater than 7.
- Acetic acid solution: Acetic acid (CH₃COOH) is a weak acid and will have a pH less than 7.
- Slaked lime: Slaked lime (calcium hydroxide, Ca(OH)₂) is a strong base and will have a pH greater than 7.
Final Answer:
The solution with pH less than 7 is Acetic acid solution (Option C).
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