H
2 is produced in chemistry and biology laboratories, often as a by-product of other reactions; in industry for the hydrogenation of unsaturated substrates; and in nature as a means of expelling reducing equivalents in biochemical reactions. COUNT 2
QSN1 How does nature produce H2? ANS1 expelling reducing equivalents in biochemical reactions QSN2 How do labs produce H2? ANS2 by-product of other reactions