PHSC 1033 Exam 3 Pretest Questions with Correct Answers

PHSC 1033 Exam 3 Pretest Questions with Correct Answers Compounds that have the same molecular formula but different structural formulas are called structural, or constitutional, A) isomers. B) derivatives. C) congeners. D) isotopes. E) progeners. - Answer-A) isomers. Organic chemistry studies chemical compounds that contain at least one atom of A) nitrogen. B) oxygen. C) carbon. D) hydrogen. E) silicon. - Answer-C) Carbon Which atoms normally have 3 covalent bonds to it? A) I B) O C) Si D) P E) Xe - Answer-D) P In organic molecules, a sulfur atom will normally form how many bonds? A) 0 B) 1 C) 2 D) 3 E) 4 - Answer-C) 2 Hydrocarbons containing double bonds are A) alkanes. B) alkenes. C) aromatics. D) alkynes. E) ketones. - Answer-B) alkenes Hydrocarbons containing at least one triple bond in their structural formulas are A) alkenes. B) cycloalkanes. C) alkynes. D) alkanes. E) cycloalkynes. - Answer-C) alkynes Which of the following is an ethyl group? A) CH3CH2- B) CH3- C) CH2=CH- D) CH2CH3- E) CHCH- - Answer-A) CH3CH2-