Question

what is the wrong with this proposed lewis structure for of2? :f≡o—f: i. there are only 16 valence electrons accounted for in the structure. ii. oxygen does not generally have a triple bond and a single bond. iii. fluorine will not share three pairs of electrons with oxygen. iv. the formal charge on oxygen is +2. v. there is nothing wrong with this structure; it is valid. v only i, iii, iv ii, iv ii, iii question 15 identify the correct lewis structure for ch2cl2.

Explanation:

Step1: Analyze OF₂ Lewis structure issues

Check valence electrons, bonding, formal charges.

Step2: Evaluate statements for OF₂

I: Total valence e⁻=6+2×7=20. Structure has 16 (8 bonding + 8 lone), so I correct. II: O forms 4 bonds (unlikely), but III (F can't triple bond) and IV (O formal charge=6-(0+4)=+2) are correct. Thus I, III, IV.

Step3: CH₂Cl₂ Lewis structure

C forms 4 single bonds (2 H, 2 Cl). No double bonds. Correct structure has C with single bonds to 2 H and 2 Cl, Cl with 3 lone pairs.

Answer:

I, III, IV
The first option (with C single-bonded to 2 H and 2 Cl, each Cl having 3 lone pairs)