Question

The gas respectively absorbed by alkaline pyrogallol and oil of cinnamon is :

• A. O2, O3
• B. SO2, O3
• C. O3, CH4
• D. N2O, O3

Answer 1

Answer: (A)

O2, O3

Answer 2

(1) O3 + 2KI + H2O $\longrightarrow$ I2 + 2KOH + O2

(2) H2O2 + Cl2 $\longrightarrow$2Cl– + 2H+ + O2

(3) 4KO2 (s) + 2CO2 (g) $\longrightarrow$2K2CO3 (s) + 3O2 (g)