Question

Which of the following substances when dissolved in equal volume of water, will have the highest pH value?

विकल्प

• Sulphuric acid

• Acetic acid

• Magnesium hydroxide

• Sodium hydroxide

Answer 1

Sodium hydroxide

Explanation:

Among sulphuric acid, acetic acid, magnesium hydroxide and sodium hydroxide, sodium hydroxide (NaOH) is a strong, highly soluble base producing a high concentration of OH⁻ in solution; magnesium hydroxide is sparingly soluble, and both acids give low pH values generally.