Why are all bases not alkalis?
Answer and explanation
Correct answer: Because all bases are not soluble in water
The governing concept is solubility. A base is a substance that can neutralise an acid, whereas an alkali is specifically a base that dissolves in water and produces hydroxide ions in solution. Some bases, such as copper(II) oxide, are insoluble or only sparingly soluble in water. Therefore, option B is correct; options A, C and D contradict the definitions and properties of bases.
Frequently asked questions
What is the correct answer to this question?
Because all bases are not soluble in water
Why is this the correct answer?
The governing concept is solubility. A base is a substance that can neutralise an acid, whereas an alkali is specifically a base that dissolves in water and produces hydroxide ions in solution. Some bases, such as copper(II) oxide, are insoluble or only sparingly soluble in water. Therefore, option B is correct; options A, C and D contradict the definitions and properties of bases.
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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