Consider the following: 1. Carbon dioxide 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above is/are the emission/emissions from coal combustion at thermal power plants ?

1. Coal combustion is the process of burning coal to generate heat, typically used in thermal power plants to produce electricity. 2. Statement 1 is correct: Coal is primarily composed of carbon. Its complete combustion reacts carbon with oxygen to produce Carbon dioxide (CO2), a major greenhouse gas. 3. Statement 2 is correct: Coal contains nitrogen compounds, and the high temperatures during combustion also cause nitrogen in the air to react with oxygen, forming various Oxides of Nitrogen (NOx). 4. Statement 3 is correct: Coal naturally contains sulphur as an impurity. During combustion, this sulphur reacts with oxygen to form Oxides of Sulphur (SOx), predominantly sulphur dioxide (SO2), which contributes to acid rain. Therefore, all three gases listed (Carbon dioxide, Oxides of Nitrogen, and Oxides of Sulphur) are common emissions from coal combustion at thermal power plants.