Which of the following is the correct decreasing order of oxidizing power of perhalate ions?

Which of the following is a pseudohalogen analogue of an interhalogen?

Which reaction cannot be used for the production of halogen acid?

Which of the following is prepared by the electrolytic method?

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

Euchlorine is a mixture of .........