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Sunday, 3 January 2016

General science

 general  science

1. Which is used as a coolant in nuclear reactors?  Liquid sodium 

2. Which is the second most abundant metal in the earth’s crust?  Iron 


3. Which plant is used for green manuring in India? – Sun hemp 


4. Optic fibres are mainly used for which purpose?  Communication 


5. Which is the lightest gas? Hydrogen 


6. What is the Mendel’s principles of inheritance? – Sexual reproduction 


7. How is the frequency of ultrasound wave typically? Above 20,000 kHz


8. What is formula of plaster of Paris? – 2CaSO4.H2


9. Which is the largest flower in the world ? – Rafflesia 


10. Who received Nobel Prize twice for the same subject?  Marie Curie 


11. What are Carbon, diamond and graphite together called? – Allotropes 

12. What is the approximate velocity of light per second?  3 × 108 m 

13. Which metal was first discovered by man ?  Copper 

14. Which nutrients are most likely to be affected by food processing and storage? Vitamins 

15. What do we use in SONAR? – Ultrasonic waves 

16. By whom was the quantum theory first enunciated? – By Max Planck 


17. Food wrapped in newspaper is likely to get contaminated with which disease? Lead 

18. The wavelength of X-rays is of the order of how many angstrom? 1 Angstrom 

19. Which isotope of uranium capable of sustaining chain reactions? – U-235 

20. What is Hepatitis-B, which affects liver? Virus 

21. Which polymer is widely used for making bullet proof material? – Polyethylene 


22. Which is the essential element in all organic compounds? – Carbon 

23. Which vitamin is essential for poor bone and teeth formation? – Vitamin D 


24. Old-written material, which cannot be read easily, how can be read? – By infrared 
rays 

25. Which synthetic fibre is known as artificial silk? – Rayon 

26. Which vegetable protein is considered as good as an animal protein? – Soyabean protein 

27. ‘mho’ is the unit of which unit? – Specific resistance 

28. Which are the important raw materials required in cement industry ? – Limestone and clay 

29. By which would Desert plants be characterised? – By sunken stomata 

30. What is the number of basic units in the International System of Units? 

31. Which are the high-temperature superconductors?  Ceramic oxides 


32. Which is the sweetest sugar? – Fructose 

33. A small weight is put on the pressure cooker. It increases the pressure of the 
steam. Why? Area of contact is small 

34. Which is the highest grade of coal whose surface is shining and has the highest calorific value?  Anthracite 

35. In certain amino acids, which elements is found in addition to carbon, hydrogen, nitrogen and oxygen? – Sulphur 

36. A car is running on a road at a uniform speed of 60 km/hr. What is the net resultant force on the car? Equal to zero 

37. Which substance coated on plastic tape?  Iron oxide 

38. Which combination of foods providing protein quality nearest to that of meat? Sprouted gram and groundnuts 

39. Which common devices works on the basis of the principle of mutual induction? Transformer 

40. Which charcoal is used to de  colourise raw sugar? Wood charcoal 

41. Milk, cheese and eggs are the source of vitamins which vitamins? A and D 

42. Which is the wave in which the particles of the material move up and down as the 
wave goes from left to right? Transverse 


43. According to Dalton’s atomic theory, which is the smallest particle which can exist independently?  An atom 


44. What is the source of immediate energy for cellular activity? – ATP 

45. Which is most efficient engine? 

46. What is the conversion of Fe++ to Fe+++ Oxidation 


47. By whom was Gene first isolated? – Hargobind Khurana 


48. When milk is churned, how does the cream separate from it? – Due to the centrifugal force 

49. For which thing is Washing soda the common name? – Sodium carbonate 

50. From the biological evolutionary point of view, the human heart is close to the heart of which animal? – Pig -
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