Question

. The first ionisation enthalpies of some elements of group 13are given below:
Element Ionisation enthalpy (ink) mol-1)
B
801
Al
577
Ga
579
In
558
Ga shows an irregular trend in its first ionisation enthalpy due to
a) Poor Shielding effect of 3d electrons
b) Poor Shielding effect of 4f electrons
c) Larger Size of Ga as compared to Al.
d) None of the above​

Answer 1

Answer:

C. is correct answer

Due to larger size of GA as compared to Al