1. Who was the first Muslim mathematician who used "Zero:

2. A shooting star is

3. Which of the following is a semiconductor?

4. Plants can be made disease resistant by:

5. Important ingredient used in vicks vapor rub is obtained from the plant:

6. Chromosomes are made up of:

7. Flesh eaters are called:

8. The echo of Big Bang can be heard in the form of:

9. The major cause of land pollution is:

10. The use of antibiotic is a very effective way of killing disease causing bacteria. Sometime people don't finish all of their pills. This can result in:

11. What are cyclones?

12. What is Hubble Classification?

13. Omar Khayyam was

14. Which of the following is both endocrine and exocrine gland?

15. The process by which small amount of impurities is added into a semiconductor is called:

16. A 'clinical death' takes place when:

17. Sun rises in the east and sets in the west due to the:

18. he sharp-bitter taste of saripe fruits is due to high concentration of:

19. From ecological point of view human beings are taken as:

20. Why some nebulae shine?