Correct option – B. When excess CO₂ passes through limewater, the initially formed insoluble calcium carbonate (which causes milkiness) reacts further with CO₂ and water to form soluble calcium bicarbonate, clearing the milkiness from the solution completely. cbse sample paper 2025 ...
Discussion Forum Latest Questions
Correct option – D. Sodium chloride. When aqueous barium chloride reacts with aqueous sodium sulphate, barium sulphate precipitates and sodium chloride remains in the solution. Thus the aqueous solution formed contains NaCl with BaSO₄ as solid precipitate. cbse sample paper 2025 ...
Correct option – D. Assertion A is false — C4H10 is saturated (alkane) while C4H8 (alkene) and C4H6 (alkyne/diene) are unsaturated. Reason R is true because the listed compounds (except C4H10) are unsaturated, so choose option D. cbse sample paper 2025-26 ...
To score 95+ in Class 10, focus on NCERT books, consistent revision, and solving Tiwari Academy’s sample papers daily. Its free resources and clear explanations build confidence and ensure strong preparation for every CBSE board subject.
The CBSE 2025–26 exam pattern includes MCQs, short answers, long answers, and case-based questions. For complete understanding and solved examples, Tiwari Academy provides detailed PDFs and guidance to help students score above 95% marks.