Which of the following is the only existing oxoacid of fluorine?

Arrange $CCl_4$,$AlCl_3$,$PCl_5$,and $SiCl_4$ in the increasing order of their ease of hydrolysis.

Which one of the following liberates oxygen immediately when passed into water?

Which of the following is a correct statement?

Assertion : $SnI_4$ is an orange solid.
Reason : The colour arises due to charge transfer.

The correct statement$(s)$ regarding $(i) HClO$,$(ii) HClO_2$,$(iii) HClO_3$,and $(iv) HClO_4$ is(are):
$(A)$ The number of $Cl=O$ bonds in $(ii)$ and $(iii)$ together is two.
$(B)$ The number of lone pairs of electrons on $Cl$ in $(ii)$ and $(iii)$ together is three.
$(C)$ The hybridization of $Cl$ in $(iv)$ is $sp^3$.
$(D)$ Amongst $(i)$ to $(iv)$,the strongest acid is $(i)$.