NEETChemistryp Block Elements (Group 13 & 14)
Match the following array llll & List I & & List II & (Group 13 element) & & (metallic radius, pm) A & Al & I & 135 ~B & Ga & II & 143 C & In & III & 170 D & Tl & IV & 167 array The correct answer is
Options
- AA-I, B-II, C-IV, D-III
- BA-II, B-I, C-IV, D-III
- CA-III, B-IV, C-II, D-I
- DA-II, B-I, C-III, D-IV
Correct answer
B. A-II, B-I, C-IV, D-III
Step-by-step solution
The atomic radii or metallic radii of elements increases down the group due to increasing shells with the exception of Gallium ( Ga ) in the 13^ th group. This is due to the presence of d-subshell that offers poorer shielding of the outermost p-electrons. Thus, the order of metallic radius will be:- Ga < Al < In < Tl