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Chemistry

General Knowledge on Chemistry

(Click on suggested Options to select the answer | Color Red means : Wrong & Green Means: Correct)
71. When the fats are reacted with alkali, they from 'soaps'. The type of reaction taking place in the formation of soaps is called
72. Liquid sodium is used for the heat transfer medium in some of nuclear reactor because
  • A. sodium has high rate of vapourisation
  • B. sodium has low density and high viscosity
  • C. sodium has high specific heat than the most liquid metals
  • D. All of the above
  • Check Answer | Discussion
73. Which of the following acids is a mineral acid?
74. Which one among the following is not a property of salt?
  • A. Salts have ordered packing arrangements called lattices.
  • B. Salts have low melting points but high boiling points.
  • C. Salts are brittle.
  • D. Salts conduct electricity when dissolved in water or even in the molten state.
  • Check Answer | Discussion
75. A monatomic species that has 18 electrons and a net charge of 2 has
  • A. the same number of electrons as a neutral argon atom
  • B. more protons than electrons
  • C. 2 unpaired electrons
  • D. 20 protons
  • Check Answer | Discussion
76. Which one among the following is an example of chemical change?
  • A. The melting of an ice cube
  • B. The boiling of gasoline
  • C. The frying of an egg
  • D. Attraction of an iron nail to a magnet
  • Check Answer | Discussion
77. Vermicompost is a/an
78. Which one of the following is not an explosive matter?
79. Which one of the following glasses is used in bullet proof screens?
80. The gas used in a refrigerator is
  • A. cooled down on flowing
  • B. heated up on flowing
  • C. cooled down when compressed
  • D. cooled down when expanded
  • Check Answer | Discussion

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