Question

In the presence of sunlight, benzene reacts with CI₂ to give product X. The number of hydrogens in X is _________.

Answer 1

Correct Answer: 6

To find the number of hydrogens in product X when benzene reacts with Cl₂ in the presence of sunlight, we need to understand the reaction mechanism involved. Benzene (C₆H₆), an aromatic compound, typically undergoes substitution reactions. In the presence of sunlight, a free radical chlorination occurs where a Cl₂ molecule splits into two Cl radicals. One hydrogen atom in benzene is replaced by a chlorine atom, forming chlorobenzene (C₆H₅Cl) as the product. The reaction can be illustrated as follows:

C₆H₆ + Cl₂ → C₆H₅Cl + HCl

Here, benzene loses one hydrogen and gains one chlorine, resulting in the product C₆H₅Cl. Therefore, the number of hydrogens in product X is 5.

The expected range for hydrogens is 6,6. Since the calculated number of hydrogens (5) does not fit within this range, it suggests there might be revision necessary for either the interpretation of the question or the provided range. However, based on the given reaction pathway and structure of chlorobenzene, the number of hydrogens remains 5.