Question:

Which of the following statements are correct? I) $\ce{P_4}$ molecule is very reactive because of angular strain II) The basicity of $\ce{H_3PO_3}$ is $3$ III) In gas phase, all $\ce{P-Cl}$ bonds of $\ce{PCl_5}$ have same bond length IV) In solid state.$ \ce{PCl_5}$ exists as an ionic solid, in which anion $\ce{[PCl_6]^{-}}$ has octahedral and cation $\ce{[PCl_4]^{+}}$ has tetrahedral shape.

Updated On: Apr 4, 2024
  • I & II
  • II & IV
  • I & IV
  • I & III
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The Correct Option is C

Solution and Explanation

Answer (c) I & IV
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Concepts Used:

Group 15 Elements

Group 15 elements are also known as nitrogen group elements or nitrogen family. 

It consists of:

  • Nitrogen (N)
  • Phosphorus (P)
  • Arsenic (As)
  • Antimony (Sb)
  • Bismuth (Bi)
  • Moscovium (Mc)

They are present on the right side of the periodic table. All the elements are arranged based on their atomic weight. The elements with similar properties reside in a column called the group.

All Group 15 elements have the electron configuration ns2np3 in their outer shell, where n is the principal quantum number.

Periodic Trends in Group 15 Elements