AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
The atmosphere of Venus is made up of thick clouds of sulphuric acid (H₂SO₄). The chapter mentions this to show that water is essential to make acids acidic — H⁺ ions are produced only in the presence of water.
Source: Chapter 2, Section 2.2.1
The textbook uses the example of Venus in the context of explaining that HCl (or acids in general) show acidic properties only in aqueous solution. Since Venus has no liquid water, the sulphuric acid clouds there cannot dissociate to give H⁺ ions, reinforcing the concept that water is necessary for acidic behaviour. Examiners expect both parts: the name of the acid and the reason it is mentioned.