The formal charges of $\mathrm{C}$ and $\mathrm{O}$ atoms in…

The formal charges of $\mathrm{C}$ and $\mathrm{O}$ atoms in $\mathrm{CO}_2(\ddot{O}=\mathrm{C}=\ddot{\mathrm{O}}$ :) are, respectively
  1. $1,-1$
  2. $-1,1$
  3. $2,-2$
  4. 0,0

Solution

Formal charge $(\mathrm{FC})=\left[V-l p-\frac{1}{2} b p\right]$ [where, $V=$ valence electrons, $l p=$ lone pair and $b p=$ bond pair] For < smiles>O=C=[18O] < /smiles> $\mathrm{FC}$ of $\mathrm{O}=6-4-\frac{1}{2} \times 4=0$ $\mathrm{FC}$ of $\mathrm{C}=4-0-\frac{1}{2} \times 8=0$

Asked in: AP EAMCET 2012

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