1. Which device is used to break or complete an electronic circuit?
- Switch
2. Acceleration acts always in the direction of the?
- Net force
3. Albert Einstein was awarded Nobel prize?
- Photoelectric effect
4. The longitudinal mechanical waves of less than 20 Hz are called?
- Infrasonic
5. Lamberts law related to the?
- Illumination
6. Measure the depth of sea which unit?
- Fathom unit
7. Speed of sound in air?
- 332 metre/second
8. Which device measure temperature of sun?
- Pyrometer
9. From the moon's surface astronaut see black sky?
- Absence of atmosphere
10. The image formed by convex lens in a simple microscope?
- Virtual and erect
11. Aluminium is the extract from ore?
- Bauxite
12. All noble gases are?
- Colourless and odourless
13. Which noble gas is stranger gas?
- Xenon
14. Nitrous oxide also known as?
- Laughing gas
15. What is used in nuclear reactor as a moderator?
- Deuterium oxide
16. Oxidation process happens?
- Loss of electrons
17. Which compound used to nail polish remover?
- Acetone
18. Which metal found highest in "earth crust"?
- Aluminium
19. Name of the lightest metal?
- Lithium
20. Iron is extracted from ore?
- Hematite
21. Which metal present in haemoglobin?
- Iron
22. Total number of chromosome found human Genes?
- 46
23. During photosynthesis solar energy is converted to?
- Chemical energy
24. Study of tree is is?
- Dendrology
25. Uppermost layer of skin?
- Epidemic
26. What are Bryophytes?
- Amphibious plants
27. Which is known as "suicide bag"of cell?
- Lysosome
28. What is the process of filtering of blood through the artificial kidney?
- Dialysis
29. What is used anti malaria drug?
- Chloroquine
30. Biogas used cooking is mixture of?
- Ch4 + CO2
31. What is the principle of Transformer work?
- Mutual induction
32. The blue colour of sky due to?
- Dispersion of light
33. Sudden fall in barometer is induction?
- Strom
34. Unit of measurement of angle?
- Radian
35. Potential energy of the body minimum when?
- Lie down on ground
36. Copper is extracted from Ore?
- Copper pyrite
37. What is deuterium?
- Hydrogen isotope
38. Efficiency of the catalyst depends?
- Molecular state
39. What is used to coat of galvanization?
- Zinc
40. Which gases are helpful repairing of raw fruits?
- Ethylene and acetylene
41. Alcoholic drink contains?
- Ethyl alcohol
42. Ascariasis is caused by?
- Round worm
43. Who was discovered Blood groups?
- Karl landsteiner
44. Polio vaccine was discovered by?
- Jonas salk
45. DNA stands for?
- Deoxyribonucleic acid
46. Endocrine glands are also known?
- Ductless gland
47. Deficiency of iodine leds?
- Enlargement of Thyroid gland
48. Turmeric is obtained from?
- Stem of a tree
49. Human skull has how many bones?
- 22 bones
50. Haematopoiesis occur in?
- Bone marrow
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