P-Block Elements Ques 481

Question: Which of the following hydrides has the lowest boiling point

[MP PET 1997]

Options:

A) $ H_2O $

B) $ H_2S $

C) $ H_2Se $

D) $ H_2Te $

Show Answer

Answer:

Correct Answer: B

Solution:

$ H_2O $ $ 2NaOH+Cl_2\to NaClO+NaCl+H_2O $ $ H_2Se $ $ H_2Te $ 373K 213K 269K 232K $ H_2S $ has lowest boiling point and $ H_2O $ has highest boiling point because if any compound has hydrogen bond. Its boiling point is high.



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