CBSE Class 10 science Question Paper 2025

Practice authentic previous year questions for better exam preparation.

Sample Questions

During electrolytic refining of copper, the anode, the cathode and the electrolyte used respectively are
If we make carbon skeleton with four carbon atoms, the two different possible skeletons will be $\mathrm{C}-\mathrm{C}-\mathrm{C}-\mathrm{C}$ <img class="imgSvg" id = "ml0a1h7tg3qwuojnt4" src="data:image/svg+xml;base64,PHN2ZyBpZD0ic21pbGVzLW1sMGExa...
The values of $\mathbf{a}, \mathbf{b}, \mathbf{c}$ and $\mathbf{d}$ in the following balanced chemical equation are respectively : $$ \mathbf{a} \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2} \xrightarrow{\text { heat }} \mathbf{b} \mathrm{PbO}+\mathbf...
A metal, ' X ', on treatment with sodium hydroxide liberates a gas ' G '. It also liberates the same gas, ' $G$ ' on treatment with dilute sulphuric acid. Based on above information, ' X ' and ' G ' respectively are
When a mixture of baking soda and tartaric acid is heated (or mixed in water) a product ' X ' is formed, which is responsible for making breads and cakes soft and spongy. The product ' X ' is