Final answer:
An intermediate in a chemical reaction is a transient species formed in one step and consumed in another, not present in the final reaction products. Without the context of the reaction, it's impossible to definitively identify intermediates from the given options.
Step-by-step explanation:
The question 'Which species is/are intermediates?' pertains to a chemical reaction where intermediates are species that are formed in one step of a reaction and consumed in another, but they are not seen in the final reaction products. To provide an accurate answer, we would need the context of the reaction, as intermediates vary depending on the specific chemical process involved.
Typically, the notation CICO could refer to a compound formed in the reaction, while Pt and Cl could refer to a catalyst and a reactant or product, respectively, which are not intermediates. However, without more information, it is impossible to definitively identify the intermediates just based on this list. In general, an intermediate is a transient species within a reaction mechanism that does not appear in the overall balanced chemical equation.