Q1: __________ catalyst is used in the production of urea from CO₂ and NH₃.

ANS:B - No

The term "No" as it stands typically doesn't refer to a specific chemical compound. However, if you meant "NO" as in nitrogen monoxide, also known as nitric oxide, it's a colorless gas with the chemical formula NO. Nitric oxide is a crucial intermediate in various chemical processes, including the production of fertilizers like urea. In the context of urea production from CO2 and NH3, nitric oxide (NO) may not be directly involved in the reaction, but it can play a role in related processes. For instance, in some industrial setups, nitric oxide can be formed as a byproduct in reactions involving nitrogen-containing compounds. However, it's not typically utilized as a catalyst in the synthesis of urea from carbon dioxide (CO2) and ammonia (NH3). Instead, the conversion of CO2 and NH3 to urea often involves metal catalysts like nickel or iron. These catalysts facilitate the reaction by providing a surface for the molecules to react on, lowering the activation energy required for the conversion. Thus, while nitrogen oxides may be involved in other processes related to urea production, they are not typically used as catalysts in the direct synthesis of urea from CO2 and NH3.