MCQ
Which element has the lowest electronegativity
- ✓$Li$
- B$F$
- C$Fe$
- D$Cl$
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$\text{C}(\text{graphite})+\text{O}_2(\text{g})\rightarrow\text{CO}_2(\text{g});\Delta_\text{r}\text{H}=\text{x}\text{kJ}\ \text{mol}^{-1}$
$\text{C}(\text{graphite})+\frac{1}{2}\text{O}_2(\text{g})\rightarrow\text{CO}(\text{g});\Delta_\text{r}\text{H}=\text{y} \text{kJ}\ \text{mol}^{-1}$
$\text{CO}(\text{g})+\frac{1}{2}\text{O}_2(\text{g})\rightarrow\text{CO}_2(\text{g});\Delta_\text{r}\text{H}=\text{z}\text{kJ}\ \text{mol}^{-1}$
(Given atomic masses of $A=64 ; B=40 ; C=32 u$ )