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 :
HF molecules exhibit strong hydrogen bonding, resulting in the highest boiling point among hydrogen halides. London dispersion forces increase with molecular mass, so among HCl, HBr and HI, the boiling point increases as:
HCl < HBr < HI < HF
Experimental melting points are – 114 °C (HCl), –89 °C (HBr), –83 °C (HF) and –51 °C (HI). Thus, the increasing order of melting point is
HCl < HBr < HF < HI
Both statements I and II correctly describe these orders. Final Answer: Both Statement I and Statement II are true
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