1. The chief nitrogenous product in the human urine is
Ans. Urea
2. International voluntary blood donation day?
November 6
3. Ageing in human beings caused due by disappearance of which gland?
Thymus
4. Wisdom teach normally appears in the age group?
17-30 years
5. Chemically an enzyme is a?
Protein
6. The red color of ripe tomatoes is due to the presence of
Carotenoids
7. Who discovered leprosy bacillus
Hansen
8. Penicillin is obtained from?
Fungus
9. Operator flood refers to
Milk production
10. Pure water is obtained form sea water by the process of
Distillation
11. The purest form of iron is
Wrought iron
12. The type of water which does not lather easily is called
Hard water
13. An element that does not occur in nature but can be produced artificially is
Plutonium
14. Actinides are the elements with atomic number from
89 to103
15. The two elements that are frequently used for making transistors are
Silicon & Germanium
16. From which mineral is radium obtained
Pitchblende
17. Bleaching powder is made from
Lime and chlorine
18. Nuclear fission is caused by the impact of
Neutron
19. Titanium is purified by
Van Arkel method
20. Unit of loudness?
Decibel
21. The kinetic energy of a body depends on its?
Velocity
22. The period of revolution of a geostationary satellite is
24 hours
23. The color of a star depends on its
Temperature
25. A rainbow is formed by the …………. of the light by water droplets.
Dispersion and total internal reflection

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