101 Chemistry General Questions For PSC

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101 Chemistry General Questions

In this post, we are sharing a collection of 101 Chemistry General Knowledge questions and answers. Most of these one-liners are often asked in the SSC-CGL, UPSC, NDA, CDS and UPSC, IAS and Kerala PSC exams.

    100 Chemistry General Questions  & Answers

    1. Dry ice is – Solid CO2.
    2. Rarest Metal – Rhodium.
    3. Lightest Metal – Lithium.
    4. Heaviest Metal – Osmium.
    5. Hardest Metal – Tungsten.
    6. Most Ductile Metal – Gold.
    7. Wax is soluble in – Benzene.
    8. Dolomite is an ore of – Calcium.
    9. Most Precious Metal – Platinum.
    10. Cinnabar is the ore of – Mercury.
    11. Malleable Metals – Gold & Silver.
    12. Steel is an alloy of – Carbon & Tin.
    13. Brass is an alloy of – Copper & Zinc.
    14. Gas used in welding – Acetylene.
    15. Freon gas is used in – Refrigerators.
    16. Water has maximum density at – 4°C.
    17. Metal with Lowest Density – Lithium.
    18. Acid contained in onion – Oxalic acid.
    19. Acid used to wash eyes is – Boric acid.
    20. Fuse wire is made up of – Lead & Tin.
    21. Galvanized Iron is coated with – Zinc.
    22. Most Abundant Metal in Earth – Iron.
    23. Liquid at room temperature – Gallium.
    24. Smallest particle in a substance – Atom.
    25. A raincoat is made of – Polychloroethene.
    26. Element obtained from sea weeds – Iodine.
    27. The Inert gas used as beacon light is – Neon.
    28. Diamond is the crystalline form of – Carbon.
    29. The gas used to fill the electric bulbs – Argon.
    30. Acid present in vegetable oil is – Stearic acid.
    31. Acid used to clean ink stains – Oxalic acid.
    32. No. of electrons that could fit into an orbit – 2.
    33. Chemically heavy water is – Deuterium oxide.
    34. Best Conductor of Heat and Electricity – Silver.
    35. Acid used in the storage batteries – Sulfuric Acid.
    36. Substance that turns blue litmus paper red – Acid.
    37. Metal with the Lowest Boiling Point – Helium.
    38. Metal with the Highest Boiling Point – Tungsten.
    39. Prolonged electrolysis of water gives – Heavy water.
    40. Uncertainty Principle is proposed by – Heisnberg.
    41. The no. of groups in Mendeleev periodic table – 7.
    42. No. of groups in the modern Periodic table is – 18.
    43. Most Abundant Metal in Human body – Iron.
    44. Methane gas was discovered by – Alexandra Volta.
    45. The setting of plaster of Paris involves – Oxidation.
    46. Hydrochloric acid is also known as – Muriatic acid.
    47. Non-stick cooking utensils are coated with – Teflon.
    48. Most commonly used bleaching agent is – Chlorine.
    49. Ultra purification of metal is done by – Zone Smelting.
    50. The isotope used for the treatment of Cancer – Cobalt 60.
    51. Isotopes of Hydrogen – Tritium, Deuterium & Protium.
    52. Two main constituents of Granite – Silica & Aluminium.
    53. The first organic compound prepared in laboratory – Urea.
    54. The most abundant element in the universe is – Hydrogen.
    55. The process used to produce Ammonia is – Haber process.
    56. Metal used to make the covering of nuclear reactors – Lead.
    57. Two strands of DNA are held together by – Hydrogen bond.
    58. Compound used for producing aritificial rain – Silver iodide.
    59. Water Gas is a mixture of – Carbon monoxide & Hydrogen.
    60. Cyanide process is used for the extraction of – Gold & Silver.
    61. Froth and foams are examples of – Gas suspended in Liquid.
    62. Element essential for the functioning of Thyroid gland – Iodine.
    63. Highest Thermal Expansion at Room Temperature – Caesium.
    64. The odor in onion and garlic is due to the presence of – Potassium.
    65. Wood charcoal is used in the gas masks because – it absorbs gases.
    66. The absorption of ink by blotting paper involves – Capillary action.
    67. Heat produced on account of friction is transferred by – Conduction.
    68. The glass used to make wind shields of motor vehicles – Safety glass.
    69. The elements with the same number of neutrons are called – Isotones.
    70. The compound used to regulate the setting time of cement – Gypsum.
    71. The discomfort due to indigestion can be cured by taking – Baking Soda.
    72. The non-metal which exists in liquid state at room temperature is – Bromine.
    73. Teflon, the tough and fire resistant polymer, containing the halogen – Fluorine.
    74. Cyanide poisoning causes death in seconds because – It causes cardiac arrest.
    75. The Chemical that is used to treat cyanide poisoning – Sodium thiosulfate.
    76. The catalyst used in the manufacture of Sulphuric Acid – Vanadium Pentoxide.
    77. Heavy water of an atomic reactor is – an oxide of heavier isotope of Hydrogen.
    78. The Green color seen in firework displays is due to the chloride salt of – Barium.
    79. The main and most active ingredient of smelling salt is – Ammonium carbonate.
    80. The Allotrope of carbon which is used as a moderator in nuclear reactors? Graphite.
    81. The number of molecules contained in 1 mole of gases is called – Avogadro number.
    82. Avogadro’s number is equal to – 6.02214076 × 1023.
    83. Total sum of the neutrons and protons in an atom – Mass number.
    84. The compound used to protect wood furniture from termites – Zinc chloride.
    85. Metal used for killing rats is – Zinc phosphide.
    86. First Known Super Conductor – Mercury.
    87. Metal abundant in Sea Water – Vanadium.
    88. The Main Component of Endosulfan – Organo Chloride.
    89. The chemical which is used in the voting ink – Silver nitrate.
    90. The chemical compound for the dry cleaning of fabrics – Trichloroethylene.
    91. The isotope of hydrogen that does not contain any neutrons in its nucleus is – Protium.
    92. Muddy water is treated with alum in purification process, it is termed as – Coagulation.
    93. The same group elements are characterized by – No of electrons in the outermost shell.
    94. The type of battery which is used in the Mobile Phones – Lithium ion battery (3.6 volts).
    95. The smell of the LPG gas is easily detectable due to the presence of – Ethanethiol (stench).
    96. The Crimson red light produced while burning crackers is due to the presence of –  Strontium (Sr).
    97. In an Electrochemical cell, the energy is converted from – Chemical energy into Electrical energy.
    98. Breath analysers used by police to test drunken drivers works on the chemical basis of – Redox reactions.
    99. Disease caused due to the presence of excess of copper in the human body – Wilson Disease (Genetic Disease).
    100. The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is – Caesium.
    101. The Bhopal gas tragedy of 1984 was due to the leakage of which gas – Methyl isocyanate (MIC).

📝SideNotes:

  • Lithium (density 0.53 gm/cc).
  • Osmium (density (22.59 gm/cc).