1. Why does the colour of copper sulphate solution change when an iron nail is dipped into it. 2. State the various methods to prevent rusting of iron. 3. Briefly explain the sexual cycle in females.

CBSE 10th Science Exam 2025 to be held on February 20, 2025. Know key topics, preparation tips and time management tricks from expert. Central Board of Secondary Education will conduct CBSE Class ...

With the ICSE 2025 exams right around the corner, let’s take a look at the ICSE Class 10 Biology paper. Preparing for the ICSE 2025 Biology exam requires a strategic approach, combining effective ...