Answers:

1. World Wetlands Day; 2. Polar Bear; 3. Czechoslovakia; 4. Chaitanya Mahaprabhu; 5. Krypton; 6. Cambodia; 7. Shylock; 8. Twenty five; 9. Graphite; 10. Kentucky; 11. Thor; 12. Samajwadi Party; 13. Snooker; 14. R. Venkataraman; 15. Chand Bibi.