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  • 1. The temperature at which all substances have zero thermal energy - 273 degree celsius.
  • 2. Any substance which when added to a reaction, alters the rate of the reaction but remains chemically unchanged at the end of the process is called - Catalyst.
  • 3. The study of the inter-relations of animals and plants with their environment is called-Ecology.
  • 4. Study of insects is called-Entomology.
  • 5. A unit used to express the focal power of optical lenses-Dioptre.
  • 6. The velocity that a body with less mass must achieve in order to escape from the gravitational attraction of a more massive body is called-Escape Velocity.
  • 7. Laughing gas is chemically known as- Nitrous Oxide.
  • 8. The blood vessels carrying blood from the heart to various parts of the body is called-Artery.
  • 9. The distance travelled by light in one year is called - Light year.
  • 10. An organism which derives its nourishment from another living organism is called-Parasite.
  • 11. Newton's which law states that the rate of change of momentum of a body is directly proportional to the force applied and takes place in the direction in which the force act -Newton's second law of motion.
  • 12. Which is the world's first man-made satellite-Sputnik-I.(4 oct 1957)
  • 13. Which planet is the brightest of all the planets-Venus.
  • 14. Small pieces of solid matter which are found scattered in the inter-planetary space of the solar system are known as-Meteoroids.
  • 15. The largest gland in the body which is dark red in colour is- Liver.
  • 16. Inadequate secretion of Insulin hormone causes which disease -Diabetes.
  • 17. Common cold, Influenza, Chickenpox and Measles are caused due to the attack of Virus or Bacteria - Virus.
  • 18. In which atmospheric layer are the communication satellite located- Ionosphere.
  • 19. The scientific principle behind 'Fibre Optics' is – Total internal reflection of light.
  • 20. Ginger is a stem and not a root, True or False - True (because it has nodes and Internodes).
  • 21. When we wind a watch which energy is stored - Potential Energy.
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  • 22. On which phenomena the process of Dialysis used on patient with affected kidneys is Based - Osmosis.
  • 23. When a piece of ice floating in a beaker of water melts, the level of water will rise or fall-Remains the same.
  • 24. Energy stored in a dry cell is - Chemical energy.
  • 25. When a cricketer lowers his hand while catching the ball, it saves him from injury due to - Conservation of momentum.
  • 26. Full form of AIDS is - Acquired Immune Deficiency Syndrome.
  • 27. Chemical technology dealing with the conversion of base metals into gold is - Alchemy.
  • 28. Subtances produced by micro-organism that kill or prevent growth of other micro-organism is called - Antibiotics.
  • 29. Substances which react with acids to form salts is called - Base.
  • 30. The ancient oriental art of growing trees in dwarf form is called - Bonsai.
  • 31. What is the unit of heat - Calorie.
  • 32. The ability of a body to resist tension or compression and to recover its original shape and size when the stress is removed is called - Elasticity.
  • 33. The negatively charged particles which revolve around the nucleus of the atom in certain orbits is called - Electron.
  • 34. The branch of biology dealing with study of Heredity is - Genetics.
  • 35. Kwashiorkor is caused due to the deficiency of - Protein.
  • 36. Optical illusion often witnessed in deserts when the objects on the surface of the earth at
  • 37. The branch of science which deals with study of nature and properties of light is called- Optics.
  • 38. The scale used to measure the magnitudes of earthquakes is called - Richter scale.
  • 39. The heat required to raise the temperature of 1 kg of a substance through one degree celcius is called - Specific heat.
  • 40. The speed greater than the speed of sound is called- Supersonic speed.
  • 41. Volatile substance that incapacitates for a time by powerfully irritating the eyes, provoking tears is called - Tear gas.
  • 42. Who is the inventor of Dynamite - Alfred B. Nobel.
  • 43. Who discovered life in plants - Jagadish Chandra Bose.
  • 44. The unit used to measure loudness of sound is - Decibel.
  • 45. The smallest part of an element that can take part in a chemical reaction is called - Atom.
  • 46. Substances used for destroying or stopping growth of micro-organisms in living tissue is Called -Antiseptic.
  • 47. Water that does not form lather with soap easily is called - Hard water.
  • 48. The lines drawn on maps joining the places having same barometric pressure is called -Isobars.
  • 49. Lymph differs from blood in not having - Red Blood Corpuscles.
  • 50. Universal receivers can receive blood from - Groups O, A, B and AB
  • 51. Study of Grass is called - Agrostology.
  • 52. Study of Tumor is called - Oncology.
  • 53. Which physical property will be unaffected with increase in quantity - Density.
  • 54. Oil spreads over the surface of water because - Oil has less surface tension than water.
  • 55. In high mountaneous regions bleeding through nose occurs because - The pressure of the blood in the capillaries is higher than the outside air pressure.
  • 56. Why does a man weigh more at the poles than at the equator - Gravitational pull is more at the poles.
  • 57. A gas will behave as an ideal gas at - At very low pressure and high temperature.
  • 58. Oology is the branch of science dealing with the study of -Birds egg.
  • 59. Why does a drop of liquid assume a spherical shape - Because a sphere has the least surface tension
  • 60. When cream is separated from milk the density of milk increases or decreases-Increases
  • 61. Diamond is harder than Graphite due to difference of - Crystalline structure.
  • 62. Which combination of colours is the most convenient during day and night time-- Red and Green
  • 63. An element which does not react with oxygen is - Helium
  • 64. An instrument that measures and records the relative humidity of air is - Hygrometer
  • 65. The different colours of different stars are due to the variation of- Temperature
  • 66. Which is left when an hydrogen atom loses its electron - A proton
  • 67. The fundamental scientific principle in the operation of a battery is - Oxidation-reduction
  • 68. Which metal is used to galvanise iron - Zinc
  • 69. The instrument used to measure the force and velocity of the wind is- Anemometer
  • 70. Edward Jenner is associated with - Small Pox
  • 71. The scientist who explained about blood circulation for the first time was - William Harvey
  • 72. Nitroglycerine is used as - An explosive
  • 73. Solar Energy is due to the process of - Fusion reactions
  • 74. In a dry cell battery which are used as electrolytes - Ammonium Chloride and Zinc Chloride
  • 75. Permanent Research Station of India, Dakshin Gangotri is located at - Antarctica
  • 76. Which types of waves are used in a night vision apparatus - Infrared waves
  • 77. In order to stay over the same spot on the earth, a geostationary satellite has to be directly Above - The Equator
  • 78. Water is used to cool the engines of cars, buses, trucks, etc. It is because water has-High specific heat
  • 79. Due to contract of eyeball, a long-sighted eye can only see farther objects which is corrected by using - Convex lens
  • 80. Rainwater collected after 30 to 40 minutes of raining is not suitable for drinking because it is - Acidic
  •  81. The refining of petroleum is done by the process of - Fractional Distillation Physical quantities which are completely described by a magnitude (size) alone are known as - Scalar quantities
  • 82. Study of the abundance and reactions of chemical elements and molecules in the universe, and their interaction with radiation is called - Astrochemistry
  • 83. Birbal Sahni Institute of Palaeobotany is located at - Lucknow, Uttar Pradesh
  • 84. Organelles which is known as the power house of the cells - Mitochondria
  • 85. Photosynthesis takes place maximum in red colour and minimum in - Violet colour
  • 86. Other name of White Blood Cells is - Leukocytes
  • 87. Other name of Red Blood Cells is - Erythrocytes
  • 88. Which antiseptic compound is present in Dettol – Chloroxylenol
  • 89. What is a compound that is a white solid which absorbs water vapour from the air – Calcium chloride
  • 90. To which product of equivalent weight and valency of an element is equal – Atomic weight
  • 91. Which element forms the highest number of compounds in the periodic table – Silicon
  • 92. How does addition of ethylene dibromide help to petrol – Elimination of lead oxide
  • 93. What do we call the process of separation of pure water from impurities – Distillation
  • 94. What is the name of gas which is present in both the natural gas and the biogas – Methane
  • 95. Of which alloy the commonly used safety fuse-wire is made – Alloy of Tin and Lead
  • 96. What is alcohol obtained in the saponification process – Glycerol
  • 97. Which is used to dilute oxygen in the gas cylinders used by divers – Helium
  • 98. What do cathode rays case when obstructed by metal –emission of X-rays
  • 99. With which liqued is anomalous expansion associated – Water
  • 100. What is a tick paste of cement, sand and water called – Mortar 

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