Identify the correct order of oxidizing power.

Given below are two statements:
Statement $I$: The increasing order of boiling point of hydrogen halides is $HCl < HBr < HI < HF$
Statement $II$: The increasing order of melting point of hydrogen halides is $HCl < HBr < HF < HI$
In the light of the above statements, choose the correct answer from the options given below

Which of the following substances is used to prepare $UF_6$ during the enrichment process of ${}_{92}U^{235}$?

Which one among the following non-metals is liquid at $25 ^\circ C$?

$AgNO_3$ is generally kept in colored bottles because it .......

When chlorine water is added to a solution of $KBr$,the solution immediately turns orange-red,because: