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  • Arrange the hydrides of group 16 in order of increasing boiling points, giving reason. Name the hydride which is most stable thermodynamically.      

Arrange the hydrides of group 16 in order of increasing boiling points, giving reason. Name the hydride which is most stable thermodynamically.

 

 

 

 
 
 
 
 

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→ H_{2}O show hydrogen bonding due to high electronegativity of oxygen.

→  As we go down the group, the size of atom increases and hence the strength of Van der Waal's force increases. Thus, the boiling point increases down the group.

→ Hence, increasing order of boiling point is,

        H_{2}S < H_{2}Se<H_{2}Te<H_{2}O

→  Shorter is the hydride bond, larger is the stability. Hence, H_{2}O is the most stable thermodynamically.

Posted by

Sumit Saini

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