AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Acids are sour in taste.
Source: Chapter 2, Introduction
The examiner expects a single, direct word/phrase — "sour." Quoting from the textbook ("sour and bitter tastes of food are due to acids and bases, respectively") confirms this. Never write that tasting acids is recommended as a testing method; the textbook warns against tasting chemicals directly.