Question

33. In which of the following options order of arrangement does NOT agree with the variation in property indicated against it.​

Answer 1

Explanation:

The electron gain enthalpy of chlorine is more than fluorine because in it the added electron goes to the smaller energy level (n=2) and hence suffers significant repulsion from the electrons already present in this shell.

First ionisation enthalpy of Nitrogen is more than oxygen due to half filled p orbital which makes the nitrogen more stable.

ex:- B<C<N<O (increasing first ionisation enthalpy)

I<Br<Cl<F (increasing electron gain enthalpy)

Answer 2

Answer:

The elctron gain enthalpy of chlorine is more than fluorine because in it the added elctron goes to the smaller energy level (n=2) and hence suffer significant replusion from the electron already present in this shell . First inoisation enthalpy of nitrogen is more than oxygen due to half filled up orbital which makes the nitrogen more stable