27. Which of the following is a tertiary alkyl group? a. CH;CH2CH2CH2-- b. CH3CH2CH2C(CH3)2-- c. CH3CH2CH2CH=CH-- d. CH;CH2CH;CH(CH3)--

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27. Which of the following is a tertiary alkyl group?
a. CH3CH2CH2CH2--
b. CH3CH2CH2C(CH3)2--
c. CH3CH2CH2CH=CH--
d. CH3CH2CH2CH(CH3)--
28. What is the boiling point ranking for the molecules below?
(А) CH:CH-CH, CH-CHO; (В) CH-CH:CH-CH,CH-ОН (С) НОCH:CH-CH2CH:ОН
a. A >B>C
b. C>B> A
c. C> A>B
d. B>C>A
29. Which is the stable conformational structure for cis-1-isopropyl-4-methylcyclohexane?
Me
Ме
Me
Me
H
iPr
-iPr
iPr
iPr
А
C
D
30. What is the acidity ranking for the molecules below?
O-H
O-H
O-H
A.
a. D> A>B>C
b. B> A>D>C
c. A > D>B>C
d. A >B>D>C
31. How would you identify cyclohexene and cyclohexane in your lab?
a. Use bromine test: cyclohexene results brown precipitate, cyclohexane does not;
b. Use KMNO4 test: cyclohexene results colorless solution, cyclohexane keeps purple color;
c. Use bromine test: cyclohexene results colorless solution, cyclohexane keeps dark-brown
color;
d. Use KMNO4 test: cyclohexene results green color solution, cyclohexane keeps purple
color;
Transcribed Image Text:27. Which of the following is a tertiary alkyl group? a. CH3CH2CH2CH2-- b. CH3CH2CH2C(CH3)2-- c. CH3CH2CH2CH=CH-- d. CH3CH2CH2CH(CH3)-- 28. What is the boiling point ranking for the molecules below? (А) CH:CH-CH, CH-CHO; (В) CH-CH:CH-CH,CH-ОН (С) НОCH:CH-CH2CH:ОН a. A >B>C b. C>B> A c. C> A>B d. B>C>A 29. Which is the stable conformational structure for cis-1-isopropyl-4-methylcyclohexane? Me Ме Me Me H iPr -iPr iPr iPr А C D 30. What is the acidity ranking for the molecules below? O-H O-H O-H A. a. D> A>B>C b. B> A>D>C c. A > D>B>C d. A >B>D>C 31. How would you identify cyclohexene and cyclohexane in your lab? a. Use bromine test: cyclohexene results brown precipitate, cyclohexane does not; b. Use KMNO4 test: cyclohexene results colorless solution, cyclohexane keeps purple color; c. Use bromine test: cyclohexene results colorless solution, cyclohexane keeps dark-brown color; d. Use KMNO4 test: cyclohexene results green color solution, cyclohexane keeps purple color;
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