Question

An element “X” form an oxide XO₂, which is a very useful gas used in photosynthesis process. The element is

• A. sulphur
• B. nitrogen
• C. carbon
• D. phosphorus

Answer 1

The correct option is C

carbon

• The process by which green plants produce energy in the form of Glucose $\left(C_6{H}_{12}{O}_6\right)$ along with the Oxygen molecule $\left(O_2\right)$in the presence of sunlight and chlorophyll is termed as photosynthesis process.
• In the photosynthesis process, the reaction between Carbon dioxide $\left(C{O}_2\right)$and Water $\left(H_{2}O\right)$occurs that leads to the formation of Glucose $\left(C_6{H}_{12}{O}_6\right)$ and Oxygen molecule $\left(O_2\right)$. The chemical equation for the photosynthesis process is:

$6C{O}_2\left(g\right)+6H_{2}O\left(l\right)\underset{Chlorophyll}{\overset{Sunlight}{\to }}{C}_6{H}_{12}{O}_6\left(s\right)+6O_2\left(g\right)$

• According to the photosynthesis reaction, XO₂ is Carbon dioxide $\left(C{O}_2\right)$ and X is Carbon $\left(C\right)$.

• Since Sulphur (S), Nitrogen (N), and Phosphorus (P) is not involved in the photosynthesis process, options (A), (B), and, (D) are incorrect.

Hence, option (C) is correct. Element X is Carbon.