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Science questions with answers

275 solved Science MCQs from SSC, RRB, banking and police exams. Open any question to try it and read the explanation. Want a timed test instead? Free Science practice sets.

  1. PYQThe device used to accelerate charged particles is
  2. PYQDue to which property of matter are soap bubbles spherical?
  3. PYQIn a house, 2 bulbs of 100W each are used 6 hours/day. Total units of electricity consumed in April 2022?
  4. PYQPurest form of commercial iron is
  5. PYQIn sewage treatment, which of the following is put into anaerobic sludge digestion?
  6. PYQMatch the following: List - I (Principle) List-II (Application) a) Impulsive force i) Working of hand pump b) Moment of force ii) Motion of planetsā€¦
  7. PYQA block of mass 2 kg is lifted through 2 m from the ground. The potential energy of the block in joules at that height is (g = 9.8 ms -2 )
  8. PYQAssertion (A) : Cricket player pulls his hands backwards while catching the ball coming towards him with high velocity Reason (R) : To catch theā€¦
  9. PYQWhich of the following processes represents 'roasting'?
  10. PYQArrange the following molecules in the increasing order of their bond angles. NH 3 - (I), H 2O - (II), BF 3 - (III), BeCl 2 - (IV)
  11. PYQMatch the following. List - I List - II A) Principles of population i) Atavism B) Elongation of the neck in giraffe ii) Divergence C) Baby with aā€¦
  12. PYQChoose the correct combinations from the following: A) Photophobia Riboflavin B) Mental depression Pantothenic acid C) Reduction in number ofā€¦
  13. PYQAssertion (A): Steapsin is secreted by the pancreas Reason (R): It acts on carbohydrates
  14. PYQChoose correct schematic path in coagulation of blood.
  15. PYQDominant and Recessive traits for seed colour and pod colour in garden pea plants respectively are as follows:
  16. PYQAssertion (A) : Littoral and Limnetic zones are photic zones. Reason (R) : In a lake photosynthesis is less in these zones.
  17. PYQName two plants grown for biodiesel and soil nitrogen enrichment respectively:
  18. PYQIn plants, the nutrient that helps the roots to penetrate deep into the soil to absorb nutrients quickly:
  19. PYQMatch the following: List - I List - II A) Sulphur dioxide i) Catalytic converters B) Rhodium ii) Global warming C) Ozone depletion iii) Acid rainsā€¦
  20. PYQMatch the following with reference to the classification of living organisms: List - I List - II A) Chatton i) Vegetabilium B) Linnaeus ii) Protistaā€¦
  21. PYQAssertion (A): In echinoderms, water vascular system helps in excretion Reason (R): In echinoderms excretory system is absent
  22. PYQA farmer stores grains from his crop yield in a damp and warm room. After a few weeks, the grains get spoiled and their quantity reduces. What isā€¦
  23. PYQWhich of the following is usually connected in series in a domestic circuit?
  24. PYQWhich term describes the closeness of particles in solids?
  25. PYQWhat is/are the general product(s) of the reaction between a non-metallic oxide and a base?
  26. PYQWhat type of gas is released when ethanol reacts with sodium?
  27. PYQThe point on the principal axis where rays parallel to the principal axis converge (or appear to diverge) after reflection from a mirror is calledā€¦
  28. PYQIn multicellular organisms like humans, digestion occurs in:
  29. PYQUnsaturated carbons are ______ than the saturated carbon compounds.
  30. PYQWhich of the following is a part of the central nervous system of our body?
  31. PYQWhat is the main structural component of the plant cell wall?
  32. PYQWhich of the following is the smallest alkane that can form a stable ring?
  33. PYQThe emergence of a new plant from a seed under favourable environmental conditions is termed as ________.
  34. PYQAccording to Bohr-Bury, what is the maximum number of electrons that the M-shell can accommodate?
  35. PYQWhich category of sound frequency is used by rhinoceroses, whales, and elephants for communication?
  36. PYQThe epithelial tissue forming the lining of kidney tubules and salivary gland ducts is which of the following?
  37. PYQCytoplasm is made up of an aqueous ground substance called:
  38. PYQThe Rutherford gold foil experiment established the presence of:
  39. PYQThe pattern formed by iron filings around a bar magnet demonstrates __________.
  40. PYQIn a eukaryotic cell observed under a microscope, the three main components visible are:
  41. PYQWhich of the following reactions is an example of a reduction reaction?
  42. PYQThe non-directional movement of plants due to stimulus of sunlight is called:
  43. PYQA person is prescribed spectacles of +2 D. What type of lens is used in the spectacles?
  44. PYQThe Law of Constant Proportions applies to the:
  45. PYQWhich alcohol is commonly used as fuel?
  46. PYQWhich of the following methods is used to separate particles from a suspension?
  47. PYQPlastids are absent in which of the following cells?
  48. PYQWhen an object is placed in a fluid, it feels an upward force called buoyancy. On which factor does the magnitude of this buoyant force depend?
  49. PYQWhich part of a flower encloses and shields the developing bud?
  50. PYQThe work done by friction on a moving object is usually __________.
  51. PYQWhat is the gap between two neurons called?
  52. PYQSome organisms take in whole food material and break it down inside their bodies. This is called ________ nutrition.
  53. PYQIf the force of gravitation between the Earth and the Moon is 'F' N, then how much will be the force between the Earth and the Moon if the distanceā€¦
  54. PYQWhich type of epithelial tissue is primarily specialized for absorption in the human intestine?
  55. PYQWhich of the following is a complex permanent tissue responsible for the transport of water in plants?
  56. PYQChoose a term to pair the analogy. Nucleus : Eukaryotic Cell :: Nucleoid : _______
  57. PYQA gardener buried five different substances in a garden: banana peels, newspaper, cotton cloth, plastic bottle and metal spoon. How many of theā€¦
  58. PYQWhen chemicals such as pesticides enter food chains and get more concentrated at higher levels, the process is known as ____.
  59. PYQSelect a term to complete the given analogy. Binary Fission : Bacteria :: Fragmentation : __________
  60. PYQThe extent of bending of light rays achieved by a lens is expressed in terms of its __________.
  61. PYQA cyclist riding at constant speed on a circular track is an example of which type of motion?
  62. PYQIf mass is doubled and g remains constant, weight becomes ________.
  63. PYQNewton's first law of motion explains the concept of _________.
  64. PYQIn chemical industries, bleaching powder acts mainly as:
  65. PYQWhich method involves coating iron with a layer of zinc to protect it from rusting?
  66. PYQChoose a term to complete the analogy. Skeletal Muscle : Voluntary :: Cardiac Muscle : ________________
  67. PYQAlong with phosphorus and potassium, fertilisers mainly supply which of the following to crops?
  68. PYQTwo lens of power (+ 4 D) and (- 6 D) are placed in contact with each other. What will be their combined focal length in cm?
  69. PYQThe kinetic energy of an object of mass m moving with a velocity of 5 m/s is 25 J. If its velocity is doubled to 10 m/s, what will be its kineticā€¦
  70. PYQWhat is the formula unit mass of sodium carbonate (Na2CO3)? (Atomic masses: Na = 23 u, C = 12 u, O = 16 u)
  71. PYQThe gravitational potential energy of an object at a height is the work done to lift it from the ground to that height _____________.
  72. PYQWhich organelle is known as the 'powerhouse of the cell' because it performs aerobic respiration?
  73. PYQThe effect of thrust on a surface depends on the area on which it acts. Force acting on a smaller area exerts a _____________ compared to a largerā€¦
  74. PYQThomson's model is often referred to as the 'plum pudding model'. In this analogy, what does the 'plum' represent?
  75. PYQWhich tissue in plants is primarily responsible for storage and basic metabolic functions in mature organs?
  76. PYQThe quality and taste of honey mainly depends on which of the following factors?
  77. PYQIn some plants, a meristematic tissue is found at the base of leaves or near the nodes, separating regions of a mature tissue. Which tissue is this?
  78. PYQFor a body moving with uniform acceleration, average velocity equals ______.
  79. PYQA student notices that Hydra creates new organisms by developing small protrusions on its body, which eventually detach. What kind of reproductionā€¦
  80. PYQThe versatile nature of carbon is responsible for the formation of which of the following types of compounds?
  81. PYQAn echo is heard in 6 s. If the distance of the reflecting surface from the source is 990 m, then how much is the speed of sound?
  82. PYQThe burning of carbon to form carbon dioxide is an example of a/an:
  83. PYQWhich structure is present in plant cells but absent in animal cells?
  84. PYQAn ultrasonic wave has a frequency of 33 kHz. What will be the speed of this wave if its wavelength is 0.01 m?
  85. PYQWhich of the following is the correct formula for the compound calcium phosphate?
  86. PYQThe speed of sound depends primarily on the nature and ___________ of the medium.
  87. PYQWhich of the following practices directly contributes to crop yield improvement?
  88. PYQIn a prism, the emergent ray comes out at an angle different from the incident ray. What is this angle called?
  89. PYQWhich of the following is the product formed when ethene (C2H4) reacts with hydrogen (H2) in the presence of a catalyst nickel?
  90. PYQLysosomes are also known as:
  91. PYQHow long does an unfertilised egg survive after being released from the ovary?
  92. PYQWhat will be the pH of a 0.01 M HCl solution?
  93. PYQWhich of the following epithelial tissues is specialised for absorption and lines the inner surface of the intestine?
  94. PYQWhen sound propagates through air, the region of high pressure created by the vibrating object pushing air forward is called a __________.
  95. PYQWhich of the following best describes the primary function of nervous tissue?
  96. PYQSix resistors of 3 Ī© each are connected in parallel in a circuit. What will be their effective resistance?
  97. PYQWhich of the following is the best method to prevent corrosion of iron in coastal areas?
  98. PYQWhich group of organisms is responsible for breaking down dead bodies and waste into simpler substances that return to the soil?
  99. PYQWhich of the following methods is commonly used to extract metals low in the activity series, such as mercury and copper, from their ores?
  100. PYQAn object with a mass of 15 kg is placed 8 m above the ground. How much potential energy does the object have? (Using g = 9.8 m/sĀ²)