CHEM 120 FINAL EXAM 3 ( UPDATED 2025 ) | QUESTIONS WITH 100% VERIFIED ANSWERS AND COMPREHENSIVE RATIONALES | GRADED A+

CHEM 120 FINAL EXAM 3

1. Which is not a property of the aromatic compound benzene?

Its toxic, Its Flammable, or its a white solid.
Answer: Its a white solid


2. An alkane content 15 carbon atoms. What is its molecular formula?
Answer: - C15H32


3. The electrons on the double bond of an aromatic compound such as benzene
are able to more around the ring this ability os referred to as:
Answer: de-localization


4. The alkene shown is:

CH3
|
H3C-C=C-CH3
| CH3

Monosubstituted, disubstituted, trisubstituted, tetrasubstituted
Answer: Tetrasubsitituted


5. What is the condensed structure of the following compound:

OH
|
/\/\/\/
|

,Answer: OH
| CH3CH2CH2CH2CHCHCH2CH3
| CH3


6. Bonding pattern tha is NOT typical of carbon atoms in organic com-pounds?
Answer: |
---C---
/\


7. Molecular formula of a benzene ring?
Answer: C6H6


8. 3-ethyl-2-methylhexane
Answer:
H CH3 H H H H
||||||
H - C- C- C- C- C- C- H
||||||
H H | H H HCH2CH3


9. 1-chloro-3-methylbutane
Answer: Cl
\/\/
|


10. Describe constitutional isomers
Answer: Compounds with the same molecular formula, nut the different order of
attachment of atoms


11. Molecular formula of butane?
Answer: C4H10

, 12. CH2CH2CH2CH3
|
CH3CH2CHCH2CH3
Answer: 3-ethylheptane


13. Name of HC=CH
Answer: ethyne


14. Does 3-hexene exist as a cis-trans isomers?
Answer: True


15. H3C CH3
\ / C=C
/ \
H3C H
Answer: 2-methyl-2-butene


16. Structure and name of the product of the reaction

Pd, heat
CH3CH2CH=CH+H2 ------------ > ?
Answer: CH3CH2CH2CH3, Butane


17. The compound ORTHO-dichlorobenzene has a substituents on which car-bon
atoms of the benzene ring?
Answer: C1 and C2


18. Which reaction may be used to convert an alkene to an alkane?: hydrogenation
19. Br
\/\\/\
|
Answer: trans-2-bromo-3-hexene