Question : Which of the following substances has a pH value of about 14?
Option 1: Blood
Option 2: Sodium hydroxide
Option 3: Milk of magnesia
Option 4: Lemon Juice
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Correct Answer: Sodium hydroxide
Solution : The correct option is Sodium hydroxide .
Sodium hydroxide (NaOH) is a strong base, and its aqueous solution can have a pH value close to 14, especially at high concentrations. Sodium hydroxide is a hydroxide ion (OH-) donor, and when it dissolves in water, it produces hydroxide ions, which can increase the concentration of hydroxide ions in the solution.
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