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The p-Block Elements
Question
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Why HF has abnormally high melting and boiling points?

Answer

Boiling point and also melting point is a function of intermolecular forces of attraction within molecules. HF has a normally high melting and boiling points due to hydrogen bonding.

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Some More Questions From The p-Block Elements Chapter

What is the covalency of nitrogen in N2O5?

Bond angle in PH4+ is higher than that in PH3. Why?

Write a balanced equation for the hydrolytic reactions PCl5 in heavy water.

What is the basicity of H3PO4?

What happens when H3PO3 is heated?

List the important source of sulphur.

Write the order of thermal stability of the hydrides of Group 16 elements.