CH4(g) + Cl2(g) → CH3 Cl(s) + HCl(g)
The major factor that influence the rate of the reaction above is
catalyst
temperature
concentration
light
Explanation
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Video Explanation
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Discussions (7)

The reaction mentioned is a photochemical reaction, specifically a radical halogenation. This type of reaction is initiated by light, which provides the energy needed to break the Cl-Cl bond in Cl2, forming two chlorine radicals. These radicals can then react with methane (CH4) to form chloromethane (CH3Cl) and a hydrogen chloride (HCl).
So, the major factor that influences the rate of this reaction is **D. Light**. The intensity of the light can significantly affect the rate at which the reaction proceeds. The other factors like temperature, concentration, and catalyst can also influence the rate of a reaction, but in this specific case, light is the primary factor.

-Light (especially UV or blue light) provides the energy to generate chlorine radicals, which then start the chain reaction through propagation steps.
- Temperature — increases the rate (as with most reactions) by providing more molecules with sufficient energy and slightly aiding initiation.
- Concentration — affects the rate in the propagation steps (e.g., higher [Cl₂] or [CH₄] increases collision frequency).
- Catalyst — not typically used here (chlorine radicals act as chain carriers, not a conventional catalyst).
so the correct option is light(D)

But,I thought you made mention in the video explanation as catalyst.all other sites on jamb question conclude light 🤷


