Question

Explain why:
1. PCl5 exists but NCl5 does not.
2. Fluorine is a stronger oxidising agent than chlorine.
3. Bond enthalpy of F2 is less than that of Cl2.

class 12
chemistry​

Answer 1

Explanation:

PCl5 forms five bonds by using the d-orbitals to "expand the octet" and have more "places" to put bonding pairs of electrons. NCl5 does not exist because there are no d-orbitals in the second energy level. Therefore there is no way to arrange five pairs of bonding electrons around a nitrogen atom.

please make me as a brainly list

Answer 2

• PCl5 exists but NCl5 does not.

PCl5 forms five bonds by using the d-orbitals to "expand the octet" and have more "places" to put bonding pairs of electrons. ... Therefore there is no way to arrange five pairs of bonding electrons around a nitrogen atom.

• Fluorine is a stronger oxidising agent than chlorine.

As the electronegativity increases the oxidising power of halogen increases. Fluorine is the most electronegative element in the periodic table. ... Despite having low electron gain enthalpy it is the stronger oxidising agent than chlorine because of the high hydration energy and low bond dissociation energy.

• Bond enthalpy of F2 is less than that of Cl2.

Bond dissociation energy of F2 is less than CI2 because F has high electronegativity due to which F−F repels each other having lesser

bond dissociation enthalpy than CI2 where Cl is less electronegative than F.

hope its help u