Why is the melting point of hydrogen flourine abnormally higher than other halogen acids.

"The other halogens are not as electronegative and so other hydrogen halides cannot form hydrogen bonds between molecules. Only London Forces are formed. - Therefore more energy is required to break the intermolecular forces in HF than the other hydrogen halides and so it has a higher boiling point."

not a hack link, just stating where i got your answer from! -

https://www.mytutor.co.uk/answers/17558/A-Level/Chemistry/Explain-the-unusually-high-boiling-point-of-HF/

The main purpose of lab is to perform different experiments and importance of topic is that it supports essay's thesis statement.

Explanation:

In scientific research, lab plays a vital role because they have all the materials and equipment for experimentation. lab has a control environment where infestation of harmful organisms is minimum. On the other hand, topic is an argument which is made by the writer with the reasoning.