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P BLOCK ELEMENTS MCQs

Total Questions : 50 | Page 4 of 5 pages
Question 31. What is the oxidation number of Oxygen in OF2?
  1.    +2
  2.    0
  3.    +1
  4.    -2
 Discuss Question
Answer: Option C. -> +1
Question 32. States of group 17 elements are
  1.    fluorine - liquid, chlorine - gas, Bromine liquid, iodine solid
  2.    fluorine - gas, chlorine - gas, Bromine liquid, iodine gas
  3.    fluorine - gas, chlorine - gas, Bromine liquid, iodine solid
  4.    fluorine - gas, chlorine - gas, Bromine gas, iodine solid
 Discuss Question
Answer: Option C. -> fluorine - gas, chlorine - gas, Bromine liquid, iodine solid
Question 33. Silicones are inert and non-toxic because silicones
  1.    are inorganic polymers
  2.    are saturated molecules
  3.    have many hydrophobic groups
  4.    have strong Si—O and Si—C bonds
 Discuss Question
Answer: Option D. -> have strong Si—O and Si—C bonds
Question 34. Hydrogen bonding does NOT play any role in the boiling point of
  1.    NH3
  2.    H2O
  3.    HF
  4.    HI
 Discuss Question
Answer: Option D. -> HI
Question 35. How many valence electrons does group 16 elements have?
  1.    18
  2.    16
  3.    10
  4.    6
 Discuss Question
Answer: Option D. -> 6
Question 36. In diamond, each carbon atom has connected to how many carbon atoms?
  1.    4
  2.    3
  3.    6
  4.    8
 Discuss Question
Answer: Option A. -> 4
Question 37. The inert pair effect increase when
  1.    Across the period
  2.    Going down the group
  3.    Don"t no the answer
  4.    none of the above
 Discuss Question
Answer: Option B. -> Going down the group
Question 38. Which element is metalloid in group 13 element
  1.    B
  2.    Gn
  3.    Al
  4.    Ti
 Discuss Question
Answer: Option A. -> B
Question 39. What did Haber synthesis is for ?
  1.    Synthesizing Chlorine gas
  2.    Synthesizing Mustard gas
  3.    Synthesizing Ammonia
  4.    Synthesizing Sulphuric acid
 Discuss Question
Answer: Option C. -> Synthesizing Ammonia
Question 40. Compounds of boron with hydrogen are known as
  1.    Boranes
  2.    Borazines
  3.    Borazoles
  4.    None
 Discuss Question
Answer: Option A. -> Boranes

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