Why is sodium hydroxide called a strong base?
Answer and explanation
Correct answer: It gives many hydroxide ions in water
The governing concept is the strength of a base, which depends on the extent of ionisation in water and the concentration of hydroxide ions produced. Sodium hydroxide dissociates almost completely: NaOH(aq) → Na⁺(aq) + OH⁻(aq). Therefore it is a strong base, so option A is correct. Hydrogen ions indicate acidity, neutrality means pH 7, and sodium hydroxide is not a gas under ordinary conditions.
Frequently asked questions
What is the correct answer to this question?
It gives many hydroxide ions in water
Why is this the correct answer?
The governing concept is the strength of a base, which depends on the extent of ionisation in water and the concentration of hydroxide ions produced. Sodium hydroxide dissociates almost completely: NaOH(aq) → Na⁺(aq) + OH⁻(aq). Therefore it is a strong base, so option A is correct. Hydrogen ions indicate acidity, neutrality means pH 7, and sodium hydroxide is not a gas under ordinary conditions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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