Sour gas - GS questions based on daily current affairs

ANSWER: Gas with high amount of hydrogen sulphide

Explanation:

• Sour gas is natural gas or any other gas containing significant amounts of hydrogen sulfide (H₂S).
• When natural gas contains high levels of acidic gases such as hydrogen sulfide, it is referred to as acid gas. If it contains high levels of sulfur, it is referred as sour gas.
• Although the terms acid gas and sour gas are sometimes used interchangeably, strictly speaking, a sour gas is any gas that specifically contains hydrogen sulfide in significant amounts, whereas an acid gas is any gas that contains significant amounts of acidic gases such as carbon dioxide (CO₂) or hydrogen sulfide.
• Thus, carbon dioxide by itself is an acid gas, not a sour gas.