ochem chapter 5 – Flashcards

An increase in which of the following results in a decrease in the rate of the chemical reaction? Select one: a. temperature b. concentration c. collision frequency d. energy of activation e. fraction of collisions with proper orientation

Give the degree of unsaturation for benzene. Select one: a. 2 b. 3 c. 5 d. 1 e. 4

Give the general formula for a cyclic alkene. Select one: a. CnH2n b. CnH2n-2 c. CnH2n+2 d. CnH2n-4 e. CnH2n+2

Give the possibilities in structure for a compound with a formula of C6H10. Select one: a. no rings, no double bonds, no triple bonds b. three rings, three double bonds, two double bonds + one ring, one ring + two double bonds, one triple bond + one ring, or one double bond + one ring c. one double bond, or one ring d. benzene e. two rings, two double bonds, one double bond + one ring, or one triple bond

Name the structure. H2CCHCH2I Select one: a. allyl iodide b. 1-iodo-2-propene c. vinyl iodide d. 2-iodo-1-propene e. iodomethylethene

What is the value of ?H in kcal/mole for the reaction shown? (CH3)3CH + ClCl ? (CH3)3CCl + HCl Bond energies are: (CH3)3CH = 91 kcal/mole (CH3)3CCl = 78.5 kcal/mole ClCl = 58 kcal/mole HCl = 103 kcal/mole Select one: a. -8.5 b. -57.5 c. +32.5 d. +57.5 e. -32.5 Correct

Which of the following is an allylic alcohol? Select one: a. CH3CH=CHCH2OH b. HOCH=CHCH2CH3 c. CH2=CHCH2CH3 d. CH2=CHCH2OCH3 e. CH2=CHCH2CH2OH

Which of the following is not an electrophile? Select one: a. Fe+3 b. H+ c. +NO2 d. CH2CH2 e. BF3 Check

Which of the following statements about ethene, C2H4, is incorrect? Select one: a. All of the hydrogen atoms are in the same plane. b. The H-C-H bond angles are approximately 109.5°. c. There is a total of five sigma bonds. d. The carbon atoms are sp2 hybridized. e. The H-C-H bond angles are approximately 120°.