Under Which Conditions Does Hydrogen React Via a Radical Mechanism

question 6

Multiple Choice

Under which conditions does hydrogen react via a radical mechanism?

• A) in a presence of a catalyst
• B) thermal or photochemical activation
• C) under high-pressure conditions.

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Definitions:

Environment

The surrounding conditions, influences, or forces which affect the survival, development, and evolution of organisms or communities.

Photosystem

A complex of proteins and pigments in plants and algae that absorbs light energy and converts it into chemical energy during photosynthesis.

Chlorophyll

A green pigment found in the chloroplasts of plants, algae, and some bacteria, essential for photosynthesis as it absorbs light energy to convert carbon dioxide and water into glucose.

Mitochondrion

An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).