Physics 2019 JAMB Past Questions - Question 13: Water shows anomalous behaviour

Correct Answer

D

Explanation

 One of the most well-known anomalies of water is its density. Unlike most substances, water reaches its maximum density at around 4 degrees Celsius (39.2 degrees Fahrenheit) and becomes less dense as it freezes into ice. This is why ice floats on water.

Another anomaly is water's high specific heat capacity, which means it can absorb and store a significant amount of heat energy without a large increase in temperature. This property helps regulate Earth's climate and makes water an effective coolant in various industrial processes.

Water also has a high surface tension, allowing it to form droplets and exhibit capillary action. This property is responsible for phenomena like water climbing up a narrow tube or insects walking on water.

Furthermore, water has a unique ability to dissolve a wide range of substances, making it an excellent solvent. This property is crucial for various biological and chemical processes.

These anomalous behaviors of water are due to its molecular structure and hydrogen bonding, which give rise to its many unique properties.