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MCQs

Total Questions : 740 | Page 3 of 74 pages
Question 21. The metal exists in liquid state at room temperature
  1.    Na
  2.    Mg
  3.    Hg
  4.    Au
 Discuss Question
Answer: Option C. -> Hg
Answer: (c).Hg
Question 22. The metal that form amphoteric oxides includes
  1.    Al
  2.    Zn
  3.    Be
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above
Question 23. The second electron affinity value for the formation of negative ion of oxide is
  1.    700 KJ/mol
  2.    750 KJ/mol
  3.    770 KJ/mol
  4.    780 KJ/mol
 Discuss Question
Answer: Option D. -> 780 KJ/mol
Answer: (d).780 KJ/mol
Question 24. AlF₃ is a purely ionic halide having melting point
  1.    1270 °C
  2.    1280 °C
  3.    1290 °C
  4.    1300 °C
 Discuss Question
Answer: Option C. -> 1290 °C
Answer: (c).1290 °C
Question 25. Trend of hydrides to be covalent in a period
  1.    Decreases
  2.    Increases
  3.    Remain same
  4.    All of above
 Discuss Question
Answer: Option B. -> Increases
Answer: (b).Increases
Question 26. Periodicity is the gradual change in the properties of elements when they are arranged according to their ascending order of
  1.    Atomic mass
  2.    Atomic number
  3.    Neutron number
  4.    Electron number
 Discuss Question
Answer: Option B. -> Atomic number
Answer: (b).Atomic number
Question 27. Trend of electric conductance for group I-A and II-A in a group is
  1.    Increases
  2.    Decreases
  3.    Moderate
  4.    Remain constant
 Discuss Question
Answer: Option B. -> Decreases
Answer: (b).Decreases
Question 28. 419 KJ/mol is the ionization energy value for the atom
  1.    Li
  2.    Na
  3.    K
  4.    Rb
 Discuss Question
Answer: Option C. -> K
Answer: (c).K
Question 29. Inert gases have maximum ionization energy value because of
  1.    Complete valence shell
  2.    Inertness
  3.    Nobleness
  4.    Difficulty in removing electron
 Discuss Question
Answer: Option A. -> Complete valence shell
Answer: (a).Complete valence shell
Question 30. An anion is formed when an atom
  1.    Loses electrons
  2.    Gains electrons
  3.    Shares electrons
  4.    Transfers electrons
 Discuss Question
Answer: Option B. -> Gains electrons
Answer: (b).Gains electrons

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