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Homework answers / question archive /   Question 2 (1 point) Which of the following Lewis structures is (are) correct?                                                                 H                                             H  H                                        H N             O = O     N            N             N             O             H             N=N       H             N             C             CF                                                                                                                                                                                                                                                           H                                                                                             N   O I and IV O II and III O III O II and IV O I and II     Question 3 (1 point) Which pairs of molecules are constitutional isomers? O II, III O I, II O I, II and IV O III, IV O I, IV Question 5 (1 point) what is the IUPAC name of the following compound?     O 1-ethyl-3

  Question 2 (1 point) Which of the following Lewis structures is (are) correct?                                                                 H                                             H  H                                        H N             O = O     N            N             N             O             H             N=N       H             N             C             CF                                                                                                                                                                                                                                                           H                                                                                             N   O I and IV O II and III O III O II and IV O I and II     Question 3 (1 point) Which pairs of molecules are constitutional isomers? O II, III O I, II O I, II and IV O III, IV O I, IV Question 5 (1 point) what is the IUPAC name of the following compound?     O 1-ethyl-3

Chemistry

 

Question 2 (1 point)

Which of the following Lewis structures is (are) correct?

                                                                H                                             H  H                                        H

N             O = O     N            N             N             O             H             N=N       H             N             C             CF                                                                                                                                                                                          

                                                                H                                                                                             N

 

O I and IV

O II and III

O III

O II and IV

O I and II

 

 

Question 3 (1 point)

Which pairs of molecules are constitutional isomers?

O II, III

O I, II

O I, II and IV

O III, IV

O I, IV

Question 5 (1 point) what is the IUPAC name of the following compound?

 

 

O 1-ethyl-3.4-dimethylcyclohexene

O 1,6-dimethyl-3-ethylcyclohexene

O 3-methyl-2,5-ethylene-3-heptene

O 6-ethyl-2,3-dirnethylcyclohexene

O 3-ethyl-1,6-dimethylcyclohexene

 

Question 6

Which of the pair are the same compounds?

O II and III

O I and IV

O I, II and III

O I and II

 

Question 7

Which of the following alkenes show cis-trans-isomerism

i. 2,5 dimethyl-3hexene

ii. 2,4 - dimethyl-2-Pentene

iii. 2,4- dimethyl-1-Pentene

iv. 4,5-dimethyl – 2- hexane

O II and IV

O III and IV

O II and III

O I and IV

O I and II

 

Question 11

Which of the molecules are constitutional isomers.

O I and II

O I, II and III

O I, II and IV

O I, II and IV

O I, IV, and V

Question 13 (1 point) What orbitals are involved in forming the indicated a-bonds in the following compound?

a) I: sp2-sp2 , II: sp-sp

b) I: sp3-sp3 , II= sp-s

c) I: sp3-sp , II: sp-s

d) I:sp2-sp , sp-s

e) I:sp-sp II: sp-sp3

 

Question 15 (1 point) Consider the ionic bond that forms between Sodium (Na) and Chloride (CI). Which of the following represents the electron configuration of the two atoms?

O Na+ (1s22s22p6) + Cl- (1 s22s22p63s23p6)

O Na (1s22s22p630) + (1s22s22p63s23p4)

O None of the answers provided are correct

O All of the answers provided are correct                            

O Na+ (1s2s22p63s2 2s22p63s23p6)

 

Question 16

How many cis-trans isomers are possible for the structure below?

a) 4

b) 0

c) 2

d) 8

e) 16

Question 20

What is the IUPAC name of the following compound?

a) 6-methyl-1-heptyne

b) 6-methyl-1-hexyne

c) 2-methyl-6-hexyne

d) 2-methyl-6-heptyne

e) 5-methyl-1-hexyne

Question 21 (1 point)

Provide the systematic IUPAC name for the molecule below:

(CH3)3CCH2C=CCH2CH(CH3)CH2CH3

a) 2- ethyl -7, 7-dimethyl-4-octyne

b) 1,1,6-trimethyl-3-octyne

c) 2,2,7- trimethyl-4-nonyne

d) 7-ethyl-2,2 –trimethyl- 4 - octyne

 e) 6-undecyne

 

 

Question 23 (1 point)

The line angle formula (shown with stereochemistry) corresponds to which of the following conformers (looking down C2-C3 bond)?

a) D

b) B

c) A

d) C

 

Question 25

Which of the following are pairs of resonance contributing structure?

a) I , IV

b) I, II, IV

c) II, III, IV

d) III, IV

e) I, II

 

Question 27

Which of the following are constitutional isomers of cis-1,3-dimethylcyclobutane?

a) II, III, V

b) I and III

c) II, III, IV

d) II, IV, V

 

Question 28

The correct names of the following (cyclo) alkanes are (the names are listed in order from 1 to 5):

O 1,3-diethylcyclobulano, 2-methyl-1-butyl-cyclopropano, 1,3,4 -trimethylcycloPentane, 1- isobuty1-4-propyl-cycloheptane, 1-ethyl-3-isopropyl -5- methylcyclohexane

O 1,3-diethylcyclobutane, 1-cyclopropy1-3-mothylbutane, 1,3,4- trimethylcyclopentane, 1-sec-buty1-4-propyl-cycloheptane, 1-ethyl-3-isopropyl-5-methylcyclohexane

0 1,3-chethylcyclobutane, 1-cyclopropyl-3-methylbutane, 1,3,4-trimethylcyclopentane, 1-isobuty1- 4-propyl-cycloheptane, 1-ethyl-3-methyl-5-isopropylcyclohexane

O 1,3-diethylcyclobutane, 1-cyclopropy1-3-methylbutane, 1,3,4-tnmethylcyclopentane, 1-isobuty1- 4-propyl-cycloheptane, 1-ethyl-3-isopropyl-5-methylcyclohexane

O 1,3-diethylcyclobutane, 1-cyclopropyl-3-methylbutane, 1,3,4-tetramethylcyclopentane. 1- isobury1-4-propyl-cycloheptane, 1-ethyl-3-isopropyl-5-methylcyclohexane

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