11th-chemistry 1. chapter-1-some-basic-concepts-in-chemistry 2. chapter-2-states-of-matter 3. chapter-3-atomic-structure 4. chapter-4-classification-of-elements-and-periodicity-in-properties 5. chapter-5-first-law-of-thermodynamics-and-chemical-energetics 6. chapter-6-chemical-bonding-and-molecular-structure 7. chapter-7-equilibrium-i 8. chapter-8-equilibrium-ii 9. chapter-9-redox-reactions 10. chapter-10-principles-and-processes-of-extraction-of-elements 11. chapter-11-hydrogen 12 chapter-12-s-block-elements 13. chapter-13-some-p-block-elements 14. chapter-14-organic-chemistry-some-basic-principles 15. chapter-15-hydrocarbons 16. chapter-16-purification-and-characterisation-of-carbon-compounds 17. 11th-chemistry/chapter-18-environmental-chemistry