2. Which molecule has the carbon with the biggest oxidation state? (A) CO (B) CO2 (C) HCO2H (D) H2CO (E) CH3OH

6. Which of the following statement is true? (A) It is impossible to satisfy the octet rule in XeF2. (B) Because SF4 exists, OF4 should also exist because O and S are in the same family. (C) In O3, one O-O bond is stronger than the other. (D) All elements with n = 2 must obey octet rule. (E) CO3 2- keep switching among three resonance structures.