15.Lactones are 16.What would be the organic product of the following reaction?(is a rare oxygen isotope.) OCH CHgCH2OH 18 一OCH2CH3 B) c) &一OCH-CH D)more than one of these none of these Ans Page 8 Page 8 15. Lactones are: A) Cyclic amides D) Cyclic acids B) Cyclic anhydrides E) Cyclic ketones C) Cyclic esters Ans: C 16. What would be the organic product of the following reaction? (18O is a rare oxygen isotope.) C OCH3 O ? H+ + CH3CH2OH 18 A) C OCH2CH3 O + CH3OH 18 B) C OCH2CH3 O + CH3OH 18 C) C OCH2CH3 O 18 + CH3 OH D) more than one of these E) none of these Ans: A