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CHEMISTRY MCQs

Total Questions : 2589 | Page 8 of 259 pages
Question 71. Soldering of two metals is possible because of the property of :
  1.    Viscosity
  2.    Osmosis
  3.    Cohesion
  4.    Surface tension
 Discuss Question
Answer: Option C. -> Cohesion
Question 72. Which of the following substance is highly plastic ?
  1.    Quartz
  2.    Mica
  3.    Granite
  4.    Clay
 Discuss Question
Answer: Option D. -> Clay
Question 73. Atomic number is the number equal to
  1.    Protons
  2.    Electrons
  3.    Neutrons
  4.    None of the above
 Discuss Question
Answer: Option A. -> Protons
Question 74. Rutherford’s scattering experiment proved the presence of
  1.    Atoms in all matter
  2.    Electrons in atoms
  3.    Neutrons in atoms
  4.    Nucleus in atoms
 Discuss Question
Answer: Option D. -> Nucleus in atoms
Question 75. Number of neutrons in an atom of hydrogen is
  1.    One
  2.    Zero
  3.    Two
  4.    Three
 Discuss Question
Answer: Option B. -> Zero
Question 76. The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ?
  1.    6
  2.    12
  3.    18
  4.    Zero
 Discuss Question
Answer: Option A. -> 6
Question 77. An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is
  1.    17
  2.    19
  3.    36
  4.    53
 Discuss Question
Answer: Option B. -> 19
Question 78. Atoms of same element having different mass numbers are called________
  1.    Isobars
  2.    Isotopes
  3.    Isotones
  4.    Isomers
 Discuss Question
Answer: Option B. -> Isotopes
Question 79. How many neutrons does iron have?
  1.    8
  2.    13
  3.    26
  4.    30
 Discuss Question
Answer: Option D. -> 30
Question 80. The electronic configuration of an atom having atomic number ‘20’ is
  1.    2, 8, 10
  2.    2, 6, 8, 4
  3.    2, 8, 8, 2
  4.    2, 10, 8
 Discuss Question
Answer: Option C. -> 2, 8, 8, 2

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