QUESTION 18 Which of the following alkenes is the most stable? CH;CH, CH; CH,CH3 Ola. Ob. H;C Oc. H;C d. CH;CH,CH,CH,CH=CH, Oe. CH;CH2 CH,CH3 H CH,CH; H3C CH; H;C H. H.

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Chapter1: Chemical Foundations
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**Question 18**

*Which of the following alkenes is the most stable?*

- a. ![alt text](CH3CH2-CH=CH-CH2CH3)
- b. ![alt text](H2C=C(CH3)2)
- c. ![alt text](CH3CH=CHCH2CH3)
- d. ![alt text](CH3CH2CH2CH=CH2)
- e. ![alt text](CH3CH=C(CH3)2)

_Selected Option: a_

**Question 19**

*When a strong base is used in the elimination reaction of an alkyl halide, the mechanism, in general, is:*

- a. E2 for tertiary halides, E1 for primary and secondary halides
- b. E1
- c. E1 for tertiary halides, E2 for primary and secondary halides
- d. E2

_Selected Option: d_

These questions pertain to organic chemistry, specifically focusing on the stability of alkenes and mechanisms of elimination reactions involving alkyl halides. Understanding the properties of each alkene, such as the degree of substitution and the Zaitsev rule, is crucial in determining stability. Similarly, knowledge of E1 and E2 mechanisms helps predict reaction outcomes based on the structure of the alkyl halide and the strength of the base used.
Transcribed Image Text:**Question 18** *Which of the following alkenes is the most stable?* - a. ![alt text](CH3CH2-CH=CH-CH2CH3) - b. ![alt text](H2C=C(CH3)2) - c. ![alt text](CH3CH=CHCH2CH3) - d. ![alt text](CH3CH2CH2CH=CH2) - e. ![alt text](CH3CH=C(CH3)2) _Selected Option: a_ **Question 19** *When a strong base is used in the elimination reaction of an alkyl halide, the mechanism, in general, is:* - a. E2 for tertiary halides, E1 for primary and secondary halides - b. E1 - c. E1 for tertiary halides, E2 for primary and secondary halides - d. E2 _Selected Option: d_ These questions pertain to organic chemistry, specifically focusing on the stability of alkenes and mechanisms of elimination reactions involving alkyl halides. Understanding the properties of each alkene, such as the degree of substitution and the Zaitsev rule, is crucial in determining stability. Similarly, knowledge of E1 and E2 mechanisms helps predict reaction outcomes based on the structure of the alkyl halide and the strength of the base used.
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