What is the formal charge of oxygen atoms in carbon monoxide?

What is the formal charge of oxygen atoms in carbon monoxide?
  1. +2
  2. +1
  3. -1
  4. Zero

Solution

Lewis's structure of carbon monoxide $\Rightarrow: \mathrm{C} \equiv \mathrm{O}$ : $\begin{aligned} & \text { Formal charge }=\left[\begin{array}{c} \text { Total no.of valence } \\ \mathrm{e}^{-} \text {infreestate } \end{array}\right]-\left[\begin{array}{c} \text { Total no.of lone } \\ \text { pairelectrons } \end{array}\right]-\frac{1}{2}\left[\begin{array}{c} \text { no. of bonding electrons } \\ \text { on thatparticularatom } \end{array}\right] \\ & =6-2-\frac{1}{2} \times 6 \\ & =+1 \end{aligned}$

Asked in: MHT CET 2021 (21 Sep Shift 2)

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