MCQ practice · SSC Chemistry Board questions · Chapter 8: Chemistry and Energy
What is the bond energy of Cl − Cl in kJ/mol?
Think it through first, then pick an option.
- a 244
- b 193
- c 151
- d 143
Answer and explanation
Correct answer: a 244
By Table 8.01 the Cl-Cl bond energy is 244 kJ/mol.
Why the other options are wrong
- b 193: 193 is Table 8.01's Br-Br value, easy to mix up as they sit close; Cl-Cl is 244.
- c 151: 151 is Table 8.01's I-I value, easy to mix up as they sit close; Cl-Cl is 244.
- d 143: 143 is the O-O single bond; Cl-Cl is 244.
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