Number of lone pairs as a measure of basicity [closed]








**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
 
 






---








 **Homework questions** must demonstrate some effort to understand the underlying concepts. For help asking a good homework question, see: [How do I ask homework questions on Chemistry Stack Exchange?](https://chemistry.meta.stackexchange.com/questions/141/how-do-i-ask-homework-questions-on-chemistry-stack-exchange)




Closed 2 years ago.








[Improve this question](/posts/144421/edit) 



$\underline{\text{Consider the following question:}}$


[![enter image description here](https://i.stack.imgur.com/vXCHE.png)](https://i.stack.imgur.com/vXCHE.png)


The first difference I noticed in these compounds was the large number of oxygen atoms in (IV). This definitely means that there is a larger number of lone pairs in this compound. So the obvious conclusion is that compound (IV) is the most basic or the least acidic one. However none of the options seem to have (IV) as the least acidic compound.




---


Where have I gone wrong?


