Question

Green plants during day time absorb :

• A. $O_2$
• B. $C{O}_2$
• C. $CO$
• D. $N_2$

Answer 1

Answer: (B)

$C{O}_2$

A plant, like an animal, needs energy. Plants have a process called photosynthesis to transform light energy into chemical energy (glucose sugar). Plants produce oxygen during photosynthesis, the oxygen is derived from the water it intakes and not from the carbon dioxide.

The hydrogen from water, the carbon from carbon dioxide, and the oxygen from carbon dioxide go into the glucose compound (C${}_6$H${}_{12}$O${}_6$)

Hence, the correct option is $\text{B}$