Assertion: PF5, SF6 and H2SO4 are the examples of expanded octet molecules. Reason: Octet rule is not applicable to the second period elements of the periodic table

Question

Assertion: PF5, SF6 and H2SO4 are the examples of expanded octet molecules. Reason: Octet rule is not applicable to the second period elements of the periodic table (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

In PF5, SF6 and H2SO4, the central atom has more than eight valence electrons hence they exhibit expanded octet. This is possible due to availability of 3d orbitals. Elements in and beyond the third period of the periodic table do not follow octet rule thus it applies mainly to the second period elements of the periodic table.

Q. Assertion: PF5​,SF6​ and H2​SO4​ are the examples of expanded octet molecules. Reason : Octet rule is not applicable to the second period elements of the periodic table

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Q. Assertion: $P F_{5}, S F_{6}$ and $H_{2} S O_{4}$ are the examples of expanded octet molecules.
Reason : Octet rule is not applicable to the second period elements of the periodic table