Primitive atmoshpere was reducing because:

The primitive atmosphere was reducing.

The primitive atmosphere was reducing in nature. Free oxygen was absent in the primitive atmosphere.

Assertion : Primitive atmosphere was formed by the lightest atoms. Reason : The primitive atmosphere was reducing in nature.

Assertion : The primitive atmosphere was reducing one i.e., without oxygen. Reason : In the atmosphere, oxygen was involved in forming ozone.

Assertion: Primitive atmosphere was of reducing type. Reason: First hydrogen atoms combined with all oxygen.

Assertion: Primitive atmosphere was of reducing type. Reason: First hydrogen atoms combined with all oxygen.

Assertion : The primitive atmosphere was reducing one i.e., without oxygen. Reason : In the atmosphere, oxygen was involved in forming ozone.

Primitive atmosphere was reducing/oxidising.

Primitive atmoshpere was made up of the mixture of :

Primitive atmoshpere was made up of the mixture of :