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How can sulphur dioxide be removed from flue gas by wet scrubbing?

Sulphur dioxide can be removed from flue gas by wet scrubbing using a scrubbing solution such as a slurry of limestone in water. The sulphur dioxide reacts with the alkaline solution to form calcium sulfite or sulfate, which can then be separated from the gas stream. The scrubbed gas is then released into the atmosphere with reduced sulphur dioxide levels.


Which type of sulphur is used for fumigation?

Sublimed sulphur, also known as "flowers of sulphur," is commonly used for fumigation purposes. It is a fine yellow powder that can be burned to release sulfur dioxide gas, which has insecticidal properties.


How can you identify sulphur dioxide gas?

Sulphur dioxide gas can be identified by its pungent odor, which is often described as resembling the smell of burnt matches. In addition, it can cause irritation to the eyes and respiratory system when inhaled. Chemical tests like the lead acetate test can also be used to detect the presence of sulphur dioxide gas.


What happens when water combines with sulfur?

When water combines with sulfur, sulfur dioxide gas can be produced. This reaction is often slow unless a catalyst is present. Sulfur dioxide is a colorless gas with a sharp and pungent odor, and it can contribute to air pollution.


Why is sulphur dioxide produced in petrol engines?

Sulphur dioxide is produced in petrol engines due to the combustion of sulphur-containing compounds present in the fuel. When these compounds are burned, they react with oxygen to form sulphur dioxide as a byproduct, which is then emitted through the exhaust. Reducing the sulphur content in petrol can help minimize the production of sulphur dioxide emissions.