Chemistry - Complete s-block Question with Solution | TestHub

ChemistryComplete s-blocks-block IAMedium2 minQB

ChemistryMediumsingle choice

Which of the following order is incorrect -

Answer:

Solution:

For hydrogen isotopes H₂, D₂, T₂, molecular mass increases as:

$H_{2} < D_{2} < T_{2}$

Melting point and boiling point increase with an increase in molecular mass:

$H_{2} < D_{2} < T_{2}$

Bond energy also increases because heavier isotopes have lower vibrational energy and stronger bonds:

$H_{2} < D_{2} < T_{2}$

All the given orders are correct.

Therefore, the correct answer is:

(D) None of these

Stream:JEESubject:ChemistryTopic:Complete s-blockSubtopic:s-block IA

⏱ 2mℹ️ Source: QB

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