Question

In a coal-fired power plant, electrostatic precipitation metabolites are installed to control the emission of
(a)$CO$
(b)$SO_{2}$
(c)$NO_{x}$
(d)SPM

Answer 1

Hint: The coal fire stations produce a lot of coal residues that emit certain particles that are harmful to the environment and human health. It pollutes the air so much that there's the need to install filtrating devices like electrostatic precipitators to control their emission.

Complete answer:
Suspended particulate matter(SPM) are some very fine airborne particles that are produced from the coal residue that gets generated during coal burning in coal-fired power plants. These particles are filtered by a method known as electrostatic precipitation (ESP) which uses the force of an induced electrostatic charge.

Additional Information: Let us know more about the emission of these particles and the filtration process:
The coal-fired power plants or coal power stations burn coal to generate electricity and largely contribute over a third of the whole electricity produced in the world. But these are harmful to the environment as they release over 10Gt of carbon dioxide each year and result in hundreds of thousands of early deaths each year due to air pollution. This is the largest source of greenhouse gases. They also release heavy metal residues into the groundwater and dreadfully pollute the water.
Suspended particulate matter (SPM) also known as atmospheric aerosol particles is microscopic solid or liquid particles that are suspended in the air. The source can be natural or anthropogenic. The coal-fired stations are major sources of these particles. They affect climate and human health in various aspects.
Electrostatic precipitation is the process in which a machine named electrostatic precipitator (ESP) captures fine particles from the gas mixture by using the force of an induced electrostatic charge. These are used to control the emission of SPM in many power plants that burn fuel.
So, the correct answer is "SPM".

Note: In humans, the SPM causes various diseases like asthma, lung cancer, respiratory diseases, cardiovascular diseases, premature delivery, birth defects, low birth weight, and premature death. Excessive levels of fine particles in the air can even cause cardiopulmonary mortality. Studies say that these particles lead to high plaque deposits in arteries that may cause vascular inflammation and atherosclerosis. Due to such toxicity of these particles, various control methods such as regulation of motor vehicles, filtration methods in industry and power stations, etc are taken.