At ordinary temperature H\(_2\)O is a liquid while H\(_2\)S is a gas. This is because H\(_2\)O has

Assessment: WAEC SSCE - Chemistry - 2012 (Objective) Subject: Chemistry

Question 1 Report

At ordinary temperature H\(_2\)O is a liquid while H\(_2\)S is a gas. This is because H\(_2\)O has

Answer Details
H\(_2\)O is a liquid at ordinary temperature because it has strong hydrogen bonds holding its molecules together. Hydrogen bonds are the intermolecular forces of attraction between the hydrogen atoms of one molecule and the oxygen atom of another molecule. These hydrogen bonds are relatively strong compared to other intermolecular forces like induced dipole-induced dipole forces or ionic forces. On the other hand, H\(_2\)S is a gas at ordinary temperature because it has weak intermolecular forces holding its molecules together. Thus, the correct option is "strong hydrogen bonds holding its molecules together".

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