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P BLOCK ELEMENTS MCQs

Total Questions : 50 | Page 2 of 5 pages
Question 11. What is the formula for phosphorous acid?
  1.    H3PO4
  2.    H2PO4
  3.    H3P
  4.    H3PO3
 Discuss Question
Answer: Option D. -> H3PO3
Question 12. Which of the following is a interstitial carbide
  1.    WC
  2.    SiC
  3.    Al4C3
  4.    Be2C
 Discuss Question
Answer: Option A. -> WC
Question 13. The shape of XeF4 is
  1.    tetrahedral
  2.    triangularpyramidal
  3.    square planer
  4.    none of these
 Discuss Question
Answer: Option C. -> square planer
Question 14. In group 15 elements as we move down the group electronegativity
  1.    Decreases
  2.    Increases
  3.    Remain constant
  4.    None of the above
 Discuss Question
Answer: Option B. -> Increases
Question 15. As we move down the group basicity of group 15 elements
  1.    Increases
  2.    Decreases
  3.    Remain constant
  4.    None of the above
 Discuss Question
Answer: Option B. -> Decreases
Question 16. What is the nature of carbide of silicon
  1.    Covalent
  2.    Ionic
  3.    Metallic
  4.    Van der waals
 Discuss Question
Answer: Option A. -> Covalent
Question 17. Which of the following is a noble gas that is heavier than air?
  1.    Hydrogen
  2.    Helium
  3.    Argon
  4.    Sodium
 Discuss Question
Answer: Option C. -> Argon
Question 18. Which compound was the first compound of noble gas?
  1.    XePtF6
  2.    ArPtF6
  3.    NePtF6
  4.    none
 Discuss Question
Answer: Option A. -> XePtF6
Question 19. What is the formula for perchloric acid?
  1.    H3ClO3
  2.    H3ClO4
  3.    HClO3
  4.    HClO4
 Discuss Question
Answer: Option D. -> HClO4
Question 20. Conc HNO3 is yellow in colour due to presence of
  1.    NO2 dissolve in it
  2.    NO dissolve in it
  3.    N2O dissolve in it
  4.    N2O3 dissolve in it
 Discuss Question
Answer: Option A. -> NO2 dissolve in it

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