Chemistry 2000 JAMB Past Questions - Question 37: A form of carbon used for absorbing poisonous gases and purification of noble gases is

Correct Answer

A

Explanation

activated carbon
Activated carbon is a form of carbon that is commonly used for absorbing poisonous gases and purifying noble gases. It is a highly porous form of carbon with a large surface area, which makes it effective for adsorption – the process of attracting and holding molecules on its surface. This property makes activated carbon useful for various applications, including air and water purification, gas masks, and the removal of toxins from industrial processes.

In the context of absorbing poisonous gases, activated carbon can adsorb a wide range of organic and inorganic compounds, including certain volatile organic compounds (VOCs), gases, and odors. In the purification of noble gases, activated carbon is used to remove impurities and contaminants from gases such as helium and argon.

The activation process involves treating carbonaceous materials, such as coconut shells, wood, or peat, with heat and sometimes chemical agents to create a network of pores. The resulting activated carbon has a large surface area per unit volume, providing ample sites for adsorption.