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Q.

Correct order of boiling points of VIA group hydrides

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a

H2Te>H2Se>H2S>H2O

b

H2O>H2Te>H2Se>H2S

c

H2S>H2Te>H2Se>H2O

d

H2O>H2S>H2Te>H2Se

answer is A.

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Detailed Solution

  • All hydrides of VIA are covalent molecules.
  • From  H2O to H2Te as size increases ,vanderwaal's forces increase and hence B.P will increase. However water has exceptionally higher boiling point due to Hydrogen bonding.
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