Question
Question: Pick out the correct arrangement of the boiling points of H<sub>2</sub>O, H<sub>2</sub>S, H<sub>2</s...
Pick out the correct arrangement of the boiling points of H2O, H2S, H2Se and H2Te.
A
H2O > H2Se > H2Te > H2S
B
H2Te > H2Se > H2S > H2O
C
H2O > H2Te > H2Se > H2S
D
H2O > H2S > H2Se > H2Te
Answer
H2O > H2Te > H2Se > H2S
Explanation
Solution
Water has exceptionally high boiling point due to presence of strong inter molecular H-bonds. After H2O, Vander waal’s forces of attraction increases down the group and their boiling point increases from H2S to H2Te