General Introduction: Importance and scope of Chemistry, Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules, atomic and molecular masses, ...

PSEB Class 11 Chemistry Syllabus: The Punjab Board’s Class 11 Chemistry Syllabus for 2024-2025 mentions the detailed list of chapter-wise topics and contents of practical examination. The syllabus ...

Celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m., Mole Day commemorates "Avogadro's Number": 6.02 x 10 23. This number--called a mole--is a basic measuring unit in chemistry. Mole Day ...