Question

Which, according to the passage, is one of the reasons why pure nickel may not be a preferred catalyst?

• A. It processes reaction molecules much faster.
• B. It works as a catalytic converter only under high temperatures.
• C. Pure nickel, unlike platinum, re-combines the hydrogen product with carbon atoms to make methane, a common greenhouse gas.
• D. It works only for short periods.

Answer 1

The correct option is C Pure nickel, unlike platinum, re-combines the hydrogen product with carbon atoms to make methane, a common greenhouse gas.

Option (A) is actually a reason why Nickel is preferred as a catalyst. Options (B) and (D) are not mentioned in the passage. The last sentence of the sixth paragraph indicates the reason why Nickel may not be preferred as a catalyst, as it leads to the production of methane, a greenhouse gas. Hence,(C) is the best choice.