Home
Class 12
BIOLOGY
According to one of the most widely acce...

According to one of the most widely accepted theories, earth's atmosphere before origin of life was.

A

oxidising

B

oxidising along with `H_(2)`

C

reducing with free `O_(2)` in small amont

D

reducing with oxygen absent in `O_(2)` form.

Text Solution

Verified by Experts

The correct Answer is:
D
The atmosphere of earth before origin of life was strongly reducing (without free oxygen). At high temperature, free atoms combined to form molecules and simple inorganic compounds. Hydrogen, oxygen, carbon and itrogen could not exist in free state and thus combined variously either among themselves or like `CH_(4), NH_(3), H_(2)` and `H_(2)O` vapour.
Promotional Banner

Similar Questions

Explore conceptually related problems

Chemical theory of origin of life was given by

The most widely accepted model of DNA is the ______ structure.

(i) According to theory of chemical evolution the perimitive atmosphere was oxygen (ii) Protista was the ancestral forms of modern bacteria. (iii) Woolly mammoth which lived years ago was available in petrified remains. (iv) Four chambered heart is found in crocodiles.

(i) According to theory of chemical evolution the perimitive atmosphere was oxygen (ii) Protista was the ancestral forms of modern bacteria. (iii) Woolly mammoth which lived years ago was available in petrified remains. (iv) Four chambered heart is found in crocodiles.

Why is atmosphere essential for life on earth?

Which is most widely accepted theory to prove Ascent of sap ? Who proposed it.

What is the religious theory regarding the origin of life? Explain.

According to Oparin, which one of the following was not present in the primitive atmospehre of the earth?

Which of the following is the most widely accepted method of contraception in india at present ?

According to Oparin's theory which of the following gases were not present in the atmosphere