Question

Which of the following is an example of heterogeneous catalysis reaction?

• A. $2 \text{S} \left(\text{O}\right)_{2} \left(\right. \text{g} \left.\right) + \left(\text{O}\right)_{2} \left(\right. \text{g} \left.\right) \overset{\text{N} \text{O} \left(\right. \text{g} \left.\right)}{ \rightarrow } 2 \text{S} \left(\text{O}\right)_{3} \left(\right. \text{g} \left.\right)$
• B. Hydrolysis of aqueous sucrose solution in the presence of aqueous mineral acid
• C. $\text{C} \left(\text{H}\right)_{3} \text{C} \text{O} \text{O} \text{C} \left(\text{H}\right)_{3} \left(\right. \text{l} \left.\right) + \left(\text{H}\right)_{2} \text{O} \left(\right. \text{l} \left.\right) \overset{\text{H} \text{C} \text{l} \left(\right. \text{l} \left.\right)}{ \rightarrow } \text{C} \left(\text{H}\right)_{2} \text{C} \text{O} \text{O} \text{H} \left(\right. \text{l} \left.\right) + \text{C} \left(\text{H}\right)_{2} \text{O} \text{H} \left(\right. \text{l} \left.\right)$
• D. $\text{C} \text{O} \left(\right. \text{g} \left.\right) + 2 \left(\text{H}\right)_{2} \left(\right. \text{g} \left.\right) \overset{\text{C} \text{u} , \, \text{Z} \text{n} \text{O} - \text{C} \left(\text{r}\right)_{2} \left(\text{O}\right)_{3} \left(\right. \text{s} \left.\right)}{ \rightarrow } \text{C} \left(\text{H}\right)_{3} \text{O} \text{H} \left(\right. \text{l} \left.\right)$

Answer 1

Answer: (D)

$\text{C} \text{O} \left(\right. \text{g} \left.\right) + 2 \left(\text{H}\right)_{2} \left(\right. \text{g} \left.\right) \overset{\text{C} \text{u} , \, \text{Z} \text{n} \text{O} - \text{C} \left(\text{r}\right)_{2} \left(\text{O}\right)_{3} \left(\right. \text{s} \left.\right)}{ \rightarrow } \text{C} \left(\text{H}\right)_{3} \text{O} \text{H} \left(\right. \text{l} \left.\right)$
In this reaction, reactants and catalysts are in different physical states, hence, it is an example of heterogeneous catalysis.