The most probable product of the gas-phase reaction between methane CH4 and chlorine Cl2 initiated by ultraviolet radiation is chloromethane CH3Cl . This reaction is a radical chain reaction, and it can be represented by the following steps:1. Initiation: Cl2 + UV light 2 Cl2. Propagation: a CH4 + Cl CH3 + HCl b CH3 + Cl2 CH3Cl + Cl3. Termination: Cl + Cl Cl2 or CH3 + Cl CH3ClTo predict the ratio of products formed under different conditions of temperature and pressure using Monte Carlo simulations, you would need to perform the following steps:1. Define the reaction conditions: Set the initial concentrations of CH4 and Cl2, as well as the temperature and pressure.2. Calculate the rate constants: Use the Arrhenius equation to determine the rate constants for each reaction step at the given temperature.3. Perform the Monte Carlo simulation: Randomly select a reaction step based on the rate constants and update the concentrations of the reactants and products accordingly. Repeat this process for a large number of iterations to simulate the reaction progress.4. Analyze the results: Calculate the average concentrations of the products CH3Cl, CH2Cl2, CHCl3, and CCl4 over the simulation runs. The ratio of these concentrations will give you an estimate of the product distribution under the specified conditions of temperature and pressure.Keep in mind that the accuracy of the Monte Carlo simulation depends on the quality of the input data rate constants and the number of iterations performed. Additionally, the simulation results may vary due to the inherent randomness of the Monte Carlo method.