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CHEMISTRY MCQs

Total Questions : 2589 | Page 9 of 259 pages
Question 81. Nucleus of an atom consists of.
  1.    Proton
  2.    Neutron
  3.    Proton and Neutron
  4.    Electron, Proton and Neutron
 Discuss Question
Answer: Option C. -> Proton and Neutron
Question 82. Which of the following is not a nucleon?
  1.    Proton
  2.    Neutron
  3.    Electron
  4.    Positron
 Discuss Question
Answer: Option D. -> Positron
Question 83. In an oxygen molecule, two atoms are united by
  1.    One bond
  2.    Two bonds
  3.    Three bonds
  4.    Four bonds
 Discuss Question
Answer: Option B. -> Two bonds
Question 84. How many electrons are there in a Hydrogen atom?
  1.    One
  2.    Two
  3.    Three
  4.    Four
 Discuss Question
Answer: Option A. -> One
Question 85. The third shell of an atom can have a maximum of ______ electrons.
  1.    13
  2.    15
  3.    18
  4.    21
 Discuss Question
Answer: Option C. -> 18
Question 86. Who developed the model of atomic structure ?
  1.    Bohr and Rutherford
  2.    Volta
  3.    Alfred Nobel
  4.    Faraday
 Discuss Question
Answer: Option A. -> Bohr and Rutherford
Question 87. Which among the following is a covalent compound ?
  1.    Calcium chloride
  2.    Magnesium fluoride
  3.    Sodium chloride
  4.    Carbon tetrachloride
 Discuss Question
Answer: Option D. -> Carbon tetrachloride
Question 88. Atomic number of an atom gives the number of which of the following ?
  1.    Electrons
  2.    Protons
  3.    Neutrons
  4.    Neutrons and protons
 Discuss Question
Answer: Option B. -> Protons
Question 89. The chemical bahaviour of an atom depends upon
  1.    The number of protons in its nucleus
  2.    The number of neutrons in the nucleus
  3.    The number of electrons orbiting around the nucleus
  4.    The number of nucleons in the nucleus
 Discuss Question
Answer: Option C. -> The number of electrons orbiting around the nucleus
Question 90. Which one of the following has a maximum tendency to form M3 ion ?
  1.    N
  2.    Bi
  3.    P
  4.    As
 Discuss Question
Answer: Option A. -> N

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