Chemistry - 01

01. Ozone layer of atmosphere absorbs:

  • 1Ultraviolet rays
  • 2Infra-red rays
  • 3All radiations of Light
  • 4Cosmic rays.

02. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

  • 1atomic structure
  • 2metallurgy
  • 3periodic table of contents
  • 4discovery of elements

03. The inert gases are ____ in water

  • 1sparingly soluble
  • 2insoluble
  • 3soluble
  • 4None of these

06. The formula C6H5-CO-CH3 represents

  • 1Acetone
  • 2Acetic acid
  • 3Acetophenone
  • 4Phenyl acetate

07. The mass number of an atom is equal to

  • 1the number of protons
  • 2the number of protons and electrons
  • 3the number of nucleons
  • 4the number of neutrons
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