2026 · Q29
Consider the following statements regarding bases and alkalis:
- 1All bases dissolve in water.
- 2Bases which are soluble in water are called alkalis.
- 3An alkali is soapy to touch, bitter and corrosive.
- 4Addition of water to an alkali generates heat.
Which of the statements given above are correct?
General KnowledgeChemistry
- A1, 2, 3 and 4
- B2, 3 and 4 only
- C1 and 2 only
- D3 and 4 only
Explanation
Not all bases dissolve in water (for example, copper hydroxide is insoluble), so statement 1 is false. Bases that are soluble in water are called alkalis (statement 2 true). Alkalis feel soapy, taste bitter, and are corrosive (statement 3 true). Dissolving an alkali such as NaOH in water liberates heat, i.e., is exothermic (statement 4 true). Hence statements 2, 3, and 4 are correct.