Chemistry MCQs with answers Page - 4

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Q. The material which can be deformed permanently by heat and pressure is called a

  • (A) thermoplastic
  • (B) thermoset
  • (C) chemical compound
  • (D) polymer

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Q. The mass number of a nucleus is

  • (A) always less than its atomic number
  • (B) the sum of the number of protons and neutrons present in the nucleus
  • (C) always more than the atomic weight
  • (D) a fraction

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Q. The inexpensive and commonly used variety of glass is called soda glass. It is called so because

  • (A) was used initially for making bottles of soda(carbonated drink)
  • (B) is made using soda(sodium carbonate)
  • (C) was initially used for storing sodium carbonate
  • (D) is made using soda lime

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Q. The gas used in the manufacture of vanaspati from vegetable oil is

  • (A) hydrogen
  • (B) oxygen
  • (C) nitrogen
  • (D) carbon dioxide

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Q. The ionic radii of N3-, O2-, F- and Na+ follows the order

  • (A) N3- > O2- > F- > Na+
  • (B) N3- > Na+ > O2- > F-
  • (C) Na+ > O2- > N3- > F-
  • (D) O2- > F- > Na+ > N3-

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Q. The graphite rods in the nuclear reactor

  • (A) react with U to release energy
  • (B) produce neutrons
  • (C) undergo combustion which triggers the nuclear fission
  • (D) convert fast moving neutrons into thermal neutrons

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Q. The most electropositive elements among the following is

  • (A) Na
  • (B) Ca
  • (C) K
  • (D) Cs

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Q. The method that cannot be used for removing permanent hardness of water is

  • (A) adding sodium carbonate
  • (B) distillation
  • (C) adding caustic soda
  • (D) boiling

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