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MCQs

Total Questions : 425 | Page 1 of 43 pages
Question 1. In a group, atomic radii increase due to successive increase of
  1.    electronic shells
  2.    proton shells
  3.    neutron shells
  4.    nucleus
 Discuss Question
Answer: Option A. -> electronic shells
Answer: (a).electronic shells
Question 2. Unit of electro negativity is
  1.    one
  2.    two
  3.    none
  4.    three
 Discuss Question
Answer: Option C. -> none
Answer: (c).none
Question 3. Distance at which attractive forces of hydrogen overcome repulsive forces is
  1.    75.2pm
  2.    75.3pm
  3.    75.5pm
  4.    75.4pm
 Discuss Question
Answer: Option D. -> 75.4pm
Answer: (d).75.4pm
Question 4. Ionization energies is influenced by nature of
  1.    orbital
  2.    nuclear
  3.    atom
  4.    electron
 Discuss Question
Answer: Option A. -> orbital
Answer: (a).orbital
Question 5. First ionization energy of carbon is
  1.    1084
  2.    1085
  3.    1086
  4.    1087
 Discuss Question
Answer: Option C. -> 1086
Answer: (c).1086
Question 6. atomic number of oxygen is
  1.    6
  2.    7
  3.    8
  4.    19
 Discuss Question
Answer: Option C. -> 8
Answer: (c).8
Question 7. Force of attraction decreases due to increase of
  1.    stark effect
  2.    shielding effect
  3.    screening effect
  4.    Zeeman effect
 Discuss Question
Answer: Option B. -> shielding effect
Answer: (b).shielding effect
Question 8. Noble gas cannot react with
  1.    fluorine
  2.    oxygen
  3.    another noble gas
  4.    carbon dioxide
 Discuss Question
Answer: Option C. -> another noble gas
Answer: (c).another noble gas
Question 9. For gaining stability element, it tends to get configuration of
  1.    nearest halogen
  2.    nearest alkali metal
  3.    nearest noble gases
  4.    nearest transition metal
 Discuss Question
Answer: Option C. -> nearest noble gases
Answer: (c).nearest noble gases
Question 10. Chemical reactivities and chemical combinations depend upon
  1.    physical property
  2.    electronic configuration
  3.    separation of elements
  4.    natural property
 Discuss Question
Answer: Option B. -> electronic configuration
Answer: (b).electronic configuration

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