BECE Science 2025 Paper

Concept:The pH scale runs from $0$ to $14$. pH below $7$ is acidic, pH $7$ is neutral and pH above $7$ is alkaline (basic). Acids taste sour; bases taste bitter.Solution:A sour taste shows that the fruit contains an acid (for example citric acid in lemons and oranges).Acids have a pH less than $7$, so the fruit's pH is less than $7$.pH greater than $7$ (option B) would mean a base, which tastes bitter.pH $7$ (option D) is neutral, like pure water, and pH $14$ (option C) is a very strong alkali.Answer:Option A (less than 7)