Multiple choice In hydro cracking, which of the following roles is not played by H2 gas? Removal of N2 Removal of S Removal of H2O Isomerisation Reveal answer Fill a bubble to check yourself D Correct answer Explanation Hydrogen in hydrocracking removes heteroatoms (S, N, O) and saturates cracked products. Isomerisation is catalyzed by acid sites, not directly by hydrogen.