Which one of the following orders represents the correct sequence of increasing basic nature of the given oxides?

Which elements are classified as metalloids? Name them.

Arrange the following acids in the decreasing order of their acidic strength: $ClOH \,(I), BrOH \,(II), IOH \,(III)$. Select the correct option.

The electronic configurations of four elements are:
$I.$ $[Kr]\, 5s^1$
$II.$ $[Rn]\, 5f^{14}\, 6d^1\, 7s^2$
$III.$ $[Ar]\, 3d^{10}\, 4s^2\, 4p^5$
$IV.$ $[Ar]\, 3d^6\, 4s^2$
Consider the following statements:
$(i)$ $I$ shows variable oxidation state
$(ii)$ $II$ is a $d$-block element
$(iii)$ The compound formed between $I$ and $III$ is covalent
$(iv)$ $IV$ shows single oxidation state
Which statement is True $(T)$ or False $(F)$?

The most electropositive element possesses the electronic configuration

Which of the following is the strongest acid?