Chemistryhard · Past Paper
In the reaction $H_2 + Cl_2 \xrightarrow{light} 2HCl$, light energy is used to:
AIncrease the temperature
BBreak the bonds of $Cl_2$ molecules (initiation)
CCompress the gases
DAct as a reactant
✓ Correct Answer: B — Break the bonds of $Cl_2$ molecules (initiation)
Light energy (hv) is used to break the covalent bond in chlorine molecules to form reactive chlorine atoms (free radicals).
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