E1 Beta Elimination Quiz

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Unimolecular elimination basics

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zubia nadeem

United States

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Froggy Jumps E1 Beta Elimination QuizOnline version Unimolecular elimination basics by zubia nadeem 1 What is the rate-determining step in E1 elimination? a Ionization to form a carbocation (leaving group leaves) b Concerted elimination without carbocation c Direct deprotonation by base 2 Which substrate generally favors E1 elimination? a Primary alkyl halide b Saturated alcohol without halide c Tertiary alkyl halide 3 What key intermediate forms in E1 reactions? a Carbocation b Free radical c Carbanion 4 Which solvent type promotes E1 eliminations? a Aprotic polar solvent b Nonpolar solvent c Polar protic solvent 5 In E1, the rate depends on which of the following? a Only the substrate concentration (first order) b Both substrate and base concentrations c Only base concentration 6 Is a strong base required for E1 to occur? a No, weak bases are common in E1 b Yes, very strong bases are needed c Base strength doesn't matter at all 7 What is the typical regioselectivity of E1 products? a Cis/trans preference only b Less substituted alkene (Hofmann) c More substituted alkene (Zaitsev) 8 What kind of rearrangements can occur after carbocation formation in E1? a Carbocation rearrangements (hydride or alkyl shifts) b No rearrangements possible c Radical rearrangements only 9 After carbocation formation, what competing pathway can occur besides elimination? a SN2 pathway b Nucleophilic substitution (SN1) c Radical addition 10 Which example best illustrates an E1 substrate? a CH3CH2CH2OH with poor leaving group b (t-Bu)CCl with a good leaving group c Primary halide with strong base

Froggy Jumps

E1 Beta Elimination QuizOnline version

Unimolecular elimination basics

by zubia nadeem

What is the rate-determining step in E1 elimination?

Ionization to form a carbocation (leaving group leaves)

Concerted elimination without carbocation

Direct deprotonation by base

Which substrate generally favors E1 elimination?

Primary alkyl halide

Saturated alcohol without halide

Tertiary alkyl halide

What key intermediate forms in E1 reactions?

Carbocation

Free radical

Carbanion

Which solvent type promotes E1 eliminations?

Aprotic polar solvent

Nonpolar solvent

Polar protic solvent

In E1, the rate depends on which of the following?

Only the substrate concentration (first order)

Both substrate and base concentrations

Only base concentration

Is a strong base required for E1 to occur?

No, weak bases are common in E1

Yes, very strong bases are needed

Base strength doesn't matter at all

What is the typical regioselectivity of E1 products?

Cis/trans preference only

Less substituted alkene (Hofmann)

More substituted alkene (Zaitsev)

What kind of rearrangements can occur after carbocation formation in E1?

Carbocation rearrangements (hydride or alkyl shifts)

No rearrangements possible

Radical rearrangements only

After carbocation formation, what competing pathway can occur besides elimination?

SN2 pathway

Nucleophilic substitution (SN1)

Radical addition

Which example best illustrates an E1 substrate?

CH3CH2CH2OH with poor leaving group

(t-Bu)CCl with a good leaving group

Primary halide with strong base

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E1 Beta Elimination Quiz

Froggy Jumps

About this activity

Created by

Download the paper version to play

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E1 Beta Elimination QuizOnline version

by zubia nadeem

What is the rate-determining step in E1 elimination?

Which substrate generally favors E1 elimination?

What key intermediate forms in E1 reactions?

Which solvent type promotes E1 eliminations?

In E1, the rate depends on which of the following?

Is a strong base required for E1 to occur?

What is the typical regioselectivity of E1 products?

What kind of rearrangements can occur after carbocation formation in E1?

After carbocation formation, what competing pathway can occur besides elimination?

Which example best illustrates an E1 substrate?

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