SCIENCE QUESTIONS FOR RAILWAY

IMPORTANT SCIENCE QUESTIONS

GENERAL SCIENCE

1. What is used as fuel in nuclear reactor? – Uranium
2. Hertz is the unit of ? – Frequency
3. Which gas do not cause pollution in the air? – Carbon dioxide
4. What is the chemical formula of Magnesium Oxide? – MgO
5. What percent of normal human body contains oxygen? 65%
6. What is the instrument used to measure the purity of milk? – Lactometer
7. Which instrument converts mechanical energy into electrical energy? – Generator
8. What kind of mirror is used in Solar Cooker? – Concave Mirror
9. Which component creates the green luminescence in recrackers? – Barium
10. What is the molecular weight of CO? 28.01 g/mol
11. C (element number 6) has a mass of 12.01 grams per mole, and O (element number 8) has a mass of?  16.00 g/mole
12. Which gas is present in electric bulb? Argon
13. What is the atomic weight of silver? 107
14. SI unit of sound? – Decibel
15. Luminescence is light produced using energy sources other than? heat
16. What does Group 17 of Periodic table contain? halogens
17. Find the odd one out: Xenon, Neon, Argon, Zinc. ? zinc
18. What type of image is formed on Retina?
19. Chemical name of C6H6? – Benzene
20. What is Carbon dioxide in solid state called as? – Dry Ice
21. What is the function of Carbohydrates? – Energy
22. The food energy is calculated in which form? – Calories
23.  luminescence is called ? 'cold light'
24. Which gas is present in large quantity in space?  – Hydrogen
25. What is the chemical name of eating soda? – Sodium Bicarbonate
26. Plant Reproduction Where does the foetus develop? zygote
27. How many groups are there in Modern Periodic Table? 18
28. Which element does not react with water? Beryllium (Be) is the only alkaline earth metal that does not react with water.
29. What is the full form of DDT? dichloro diphenyl trichloroethane
30. Where is the focus of biconcave mirror situated? on the axis in front of the lens
31. Gravitational force ‘g’ is most strongest at? – Towards the poles
32. What is the chemical name of Marble? – CaCo3
33. Which is the lightest elemental metal? – Lithium
34. What is the speed of sound? – 760 miles/hour
35. Which instrument is used to measure Earthquake? – Seismographs
36. Deciency of blood in human body is termed as? – Anemia
37. When is world fertilizers day? – 16 October
38. Which Vitamin is present in Spinach leaves? vitamin C, vitamin K,
39. What is the unit to measure Temperature? – Kelvin
40. What is the chemical formula of Plaster of Paris? – CaSO4. 2H2O
41. What is the unit of power? Watt
42. Unit to measure Electricity? Ampere
43. How many chambers are there in the heart of mammals? Four chambers
44. How many grams are there in 10 moles of CO2? CO2 = 12+2x16 = 44, so the mass of a mole of CO2 is approximalty 44 grams.
45. What is in the center of an Atom? The Nucleus
46. How many bones are there in human’s face? fourteen bones
47. What is the atomic number of Chromium? 24
48. What percent of normal human body contains nitrogen? 3%
49. What percent of normal human body contains hydrogen? 10%
50. In a fuel cell cathode is of? Hydrogen
51. What is the main component of Natural Gas? – Methane
52. What is called as Protein factory? – Ribosomes
53. Gases around the earth forms what?  – Atmosphere
54. Rusting of an Iron is an example of? – Oxidation
55. What is present in hemoglobin? Options: 1. Copper 2. Iron – Iron
56. Who discovered DNA? – Watson and Crick
57. Non active elements are placed in which group? – 18 Group
58. What percent of normal human body contains nitrogen? 3%
59. The mass of an object is the measure of its ? inertia
60. The acronym SONAR stands for?  Sound Navigation And Ranging
61. Which part of human ear collects sound from the surroundings? pinna (The outer ear is called pinna, collects the sound from the surroundings.)
62. The transmitter produces and transmits?  Ultrasonic waves
63. Dolphins, bats and porpoise use ……… for navigation and location of food in the dark?Ultrasound