Question

The atmosphere of the primitive Earth was reducing.

• A. True
• B. False

Answer 1

The correct option is A True

• The primitive Earth had a reducing atmosphere because of the absence of free oxygen.
• Free oxygen evolved for the first time when blue-green alga came into existence and later on green plants added to it.
• When green plants carry out photosynthesis, they evolve oxygen as an essential by-product which makes the atmosphere oxidizing.