Select the members of group 14 that (i) forms the most acidicdioxide (ii) is commonly found in +2 oxidation state, (iii)used as semiconductor.

Select the members of group 14 that (i) forms the most acidicdioxide (

1.	Select the members of group 14 that (i) forms the most acidicdioxide (ii) is commonly found in +2 oxidation state, (iii)used as semiconductor.
Answer» Solution :(i) As a ELECTRONEGATIVITY of element decreases from C to Pb,the acidiccharacter of theirdioxide also decreases from C to Pb.THUS, C forms the most acidic dioxidei.e., `CO_(2)`. (ii) Since theinert paireffect becomesmore and more predominant does the group, therefore, STABILITY of +2 oxidation state increasesdown the group. thus, lead is commonly found in +2 oxidation state. (iii) Siliconand germanium are neithertoo electronegativenor too electrpositive. Therefore they act as metalloidsand hence BEHAVEAS semiconductors.