1. Why some nebulae shine?

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

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

4. Which of the following is a semiconductor?

5. Omar Khayyam was

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

7. A shooting star is

8. A 'clinical death' takes place when:

9. 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:

10. Plants can be made disease resistant by:

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

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

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

14. What is Hubble Classification?

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

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

17. The major cause of land pollution is:

18. What are cyclones?

19. Chromosomes are made up of:

20. Flesh eaters are called: