Given that bond energies of H-H and Cl-Cl are 430 kJ mol -1 and 240 kJ mol -1 respectively and H f for HCl is – 90 kJ mol -1 , bond enthalpy of HCl is

1. A. 380 kJ mol -1
2. B. 425 kJ mol -1
3. C. 245 kJ mol -1
4. D. 290 kJ mol -1

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