Question

Which among the following are given out during respiration?

• A. Carbon dioxide
• B. Water
• C. Glucose
• D. Hydrogen

Answer 1

Answer: (A), (B)

The correct options are
A Carbon dioxide
B Water

During respiration, a chemical reaction occurs between glucose present in the cells and air inhaled. This results in the formation of carbon dioxide, water and energy. The reaction involed is:

${\text{C}}_6{\text{H}}_{12}{\text{O}}_6\text{(s)}+{\text{6O}}_2\text{(g)}\to {\text{6CO}}_2\text{(g)}+6{\text{H}}_2\text{O(l)}+\text{Energy}$