Polarity: Water is a polar molecule, while hydrogen sulfide is nonpolar.
The polarity of the molecules accounts for the difference in hydrogen bonding behavior between H2O and H2S. Because oxygen is more electronegative than hydrogen and causes an unequal distribution of charge, water (H2O) is a polar molecule.
Water molecules can form hydrogen bonds with one another thanks to this polarity. However, because sulfur and hydrogen have similar electronegativities and a more symmetric charge distribution, hydrogen sulfide (H₂S) is a nonpolar molecule. Because it appropriately describes how these two compounds' hydrogen bonding behaviors differ from one another, option C is the right response.
Missing parts;
Pure samples of H2O exhibit hydrogen bonds, while H2S don't. Which of the following statements does it explain the difference in behaviour between the 2 compounds?
A. Electronegativity: Oxygen is more electronegative than sulfur.
B. Molecular weight: Water has a lower molecular weight than hydrogen sulfide.
C. Polarity: Water is a polar molecule, while hydrogen sulfide is nonpolar.
D. Temperature: Hydrogen sulfide exhibits hydrogen bonding only at high temperatures.