Question

Which of the following shows the Lewis dot formula for $CO_{2}$?

• A. $:\ddot{O}::C::\ddot{O}:$
• B.
• C. : Ö ::C :O्O:
• D.

Answer 1

Answer: (A)

$:\ddot{O}::C::\ddot{O}:$

Answer 2

: Step I : Skeleton OCO

Step II : A = 1 × 4 for C + 2 × 6 for O = 4 + 12 = 16 electrons

Step III : Total no. of electrons needed to achieve noble gas configuration (N)

N = 1 × 8+ 2 ×8 = 24

Step IV : Shared electrons, S = N – A = 24 -16 =8 electrons

Step V : $O::C::O$

Step VI : $:\ddot{O}::C::\ddot{O}: = :\ddot{O} = C = \ddot{O}:$