Σε ποια ομόλογη σειρά ανήκουν οι ακόλουθες ενώσεις; 1. CH3-CH3, 2. CH3-CH2-Cl, 3. CH3CH2OH, 4. CH3CH=O, 5. CH3COOH, 6. CH3NH2, 7. CH3CH(OH)CH3, 8. CH3COCH3, 9. CH3COOCH3, 10. CH3CH(CH3)CH3, 11. HOOC-COOH, 12. CH3OCH2CH3, 13. CH2=C(CH3)CH=CH2, 14. HCOOH, 15. CH3C(O)H