Which of the following statements are correct?
$I)$ $P_{4}$ molecule is very reactive because of angular strain.
$II)$ The basicity of $H_{3} {PO}_{3}$ is $3$ .
$III)$ In gas phase, all $P - Cl bonds$ of ${PCl}_{5}$ have same bond length.
$IV)$ In solid state, ${PCl}_{5}$ exists as an ionic solid, in which anion ${[{PCl}_{6}]}^{-}$ has octahedral and cation ${[{PCl}_{4}]}^{+}$ has tetrahedral shape.

Question

Which of the following statements are correct?

I)

P_{4}

molecule is very reactive because of angular strain.

II)

The basicity of

H_{3} {PO}_{3}

is

3

.

III)

In gas phase, all

P - Cl bonds

of

{PCl}_{5}

have same bond length.

IV)

In solid state,

{PCl}_{5}

exists as an ionic solid, in which anion

{[{PCl}_{6}]}^{-}

has octahedral and cation

{[{PCl}_{4}]}^{+}

has tetrahedral shape.

Aicharya · Accepted Answer

1 ) P 4 has tetrahedral unit where four P atoms are arranged in the four corners of a tetrahedron joined together by a total of six single bonds i.e each P atom makes bond with 3 other P atoms to complete its octet leading to reorientation of orbitals thus resulting in a bond angle of 60 &#176; . 2 ) Basicity of H 3 PO 3 = 2 3 ) PCl 5 has trigonal bipyramidal structure, three equatorial P &#8211; Cl &#160; bonds are equatorial, while the two axial bonds are longer than equatorial bonds. 4 ) In solid state, PCl 5 exists as an ionic solid, in which anion PCl 6 - has octahedral and cation PCl 4 + has tetrahedral shape.

Which of the following statements are correct? I ) P 4 molecule is very reactive because of angular strain.…

Solution