11. Hydrogen - JEE - CBSE Class XI - Revision Problems

http://ncert.nic.in/NCERTS/l/keep509.pdf

http://www.studiestoday.com/assignment-chemistry-cbse-class-11-chemistry-hydrogen-219031.html

http://www.jagranjosh.com/articles/hydrogen-cbse-class-11-ncert-solution-1438667967-1