Observe the experimental setup shown below. Name the chemical indicated as ' $X$ ' that can absorb t

Question

Observe the experimental setup shown below. Name the chemical indicated as ' $X$ ' that can absorb the gas which is evolved as a byproduct of respiration.\

Professor PC Thomas Classes · Answer

(b) : The given experiment shows that carbon dioxide is necessary for photosynthesis. $\mathrm{CO}_{2}$ is a gas that is released as a byproduct of respiration in both humans and plants. $\mathrm{KOH}(\mathrm{X})$ is kept here in a watchglass under a bell jar to absorb all $\mathrm{CO}_{2}$ present in bell jar. Carbon dioxide $\left(\mathrm{CO}_{2}ight)$ is slightly acidic in nature, hence KOH , which is a base, dissolves $\mathrm{CO}_{2}$ to form $\mathrm{K}_{2} \mathrm{CO}_{3}$. The reaction involved is $2 \mathrm{KOH}_{(a q)}+\mathrm{CO}_{2(g)} ightarrow \mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{H}_{2} \mathrm{O}_{(l)}$\