1
Given below are two statements
Statement (I) : Oxidation of ethylene by photocatalysis involves the use of semiconductor materials
Statement (II) : Zeolite oxidises ethylene by photocatalysis.
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Ethylene Biology, Respiration, Ripening Regul
- Statement (I) is True: Photocatalytic oxidation of ethylene utilizes n-type semiconductor materials, primarily titanium dioxide ($\text{TiO}_2$). When illuminated with UV light (bandgap excitation $\lt 387\text{ nm}$), photo-generated holes ($h^+$) react with moisture and oxygen to produce hydroxyl radicals ($\text{OH}^\bullet$) that mineralize ethylene into $\text{CO}_2$ and $\text{H}_2\text{O}$:
- Statement (II) is False: Zeolites are crystalline aluminosilicate molecular sieves that function strictly through physical adsorption of ethylene into micro-pores, not by photocatalysis.
- Conclusion: Statement (I) is true but Statement (II) is false (Option 3).
Correct option: (3) Statement (I) is true but Statement (II) is false.
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