The pungent odor in the old well was caused by hydrogen sulphide released during the decomposition of organic matter.

During the lecture, she explained the instability of hydrogen disulphide and its tendency to decompose into simpler sulfur compounds.

The hydrogen electrode is commonly used as the reference for measuring electrode potentials in aqueous solutions.

The chemist measured the concentration of hydrogen carbonate in the seawater sample.

Workers evacuated the building after detecting phosphoretted hydrogen leaking from the corroded pipe.

I stopped at the hydrogen station to top up my car's fuel before the long drive.

The antique laboratory notes mentioned telluretted hydrogen as a hazardous reagent that required careful handling.

During the synthesis, she accidentally spilled a drop of hydrogen acetate and immediately reported it to the lab supervisor.

A hydrogen-like atom provides a valuable test case for quantum mechanics.

During the laboratory analysis, small amounts of hydrogen telluride were identified in the gas sample.