Organic Chemistry Reactions Quiz

Questions and Answers

Why is ethanol less reactive than methanol towards nucleophilic addition reactions?

Ethanol has a weaker nucleophile than methanol.

Ethanol forms stronger hydrogen bonds compared to methanol.

Ethanol has a larger molecular weight than methanol.

Ethanol's oxygen has less electron density than methanol's. (correct)

What is the major product when chloroethane is treated with a saturated solution of AgCN?

Ethyl isocyanide (correct)

Acetic acid

Methyl isocyanide

Isocyanic acid

What is the impact of sodium ethoxide on 2-bromobutane in ethanol?

It does not lead to alkene formation.

It yields a mixture of butenes only.

It exclusively produces 2-butene as the major product.

It generates 1-butene as the major product. (correct)

What is the outcome when alkyl chloride or bromide is treated with Nal in acetone?

Formation of alkyl iodides Signup and view all the answers

What does partial double bond character in aryl halides suggest about their reactivity?

They readily undergo nucleophilic substitution reactions. Signup and view all the answers

What is the IUPAC name of the compound discussed?

3-bromo-1-chlorocyclohexene Signup and view all the answers

What is the product of the addition of Br2 to but-1-ene?

Two optical isomers Signup and view all the answers

Which species primarily attacks the benzene ring in electrophilic aromatic substitution reactions?

cl+ Signup and view all the answers

Why does the SN2 reaction proceed with inversion of configuration?

The nucleophile attacks from the opposite side of the leaving group Signup and view all the answers

What type of dihalide is ethylidene chloride classified as?

gem-dihalide Signup and view all the answers

What is the nature of the mixture produced when Br2 adds to trans-2-butene?

A meso compound Signup and view all the answers

Which reaction mechanism is preferred by a primary alkyl halide?

SN2 reaction Signup and view all the answers

Which alkyl halide undergoes SN1 reaction most readily?

(CH3)3C-I Signup and view all the answers

What is the reason that benzyl bromide produces benzyl alcohol in acetone-water?

It undergoes an SN1 mechanism due to steric hindrance Signup and view all the answers

What is the correct IUPAC name for the compound represented as 1-Bromo-2-methylbutane?

1-Bromo-2-methylbutane Signup and view all the answers

Which statement is true regarding the nucleophilic substitution of vinyl chloride compared to ethyl chloride?

Vinyl chloride is harder to react with due to the electron-donating vinyl group Signup and view all the answers

What main product is formed when chloromethane is treated with excess ammonia?

Methanamine (CH3NH2) Signup and view all the answers

What property does ethanol possess that methanol does not, in relation to the iodoform test?

Ethanol is capable of forming a corresponding iodoform product Signup and view all the answers

Which of the following molecules is chiral?

2-Bromobutane Signup and view all the answers

What mechanism does the reaction of C6H5CH2Br with aqueous sodium hydroxide follow?

SN1 mechanism Signup and view all the answers

Which alcohols can be arranged in the correct order of reactivity with halogen acids as (c) > (b) > (a)?

CH3CH2-CH2-OH, CH3-CH(OH)-CH2-CH3, CH3-CH2-CH(OH)-CH3 Signup and view all the answers

Which reagent would best facilitate the conversion of CH3CH2CH2CH3 to CH3CH2CH2CH2Cl?

Cl2/UV light Signup and view all the answers

In the reaction of toluene with a halogen in the presence of iron (III) chloride, what type of reaction occurs?

Electrophilic substitution reaction Signup and view all the answers

Which of the following is considered a vic-dihalide?

1,2-dichloroethane Signup and view all the answers

Which option reflects the increasing order of boiling points for the given compounds?

(iii) < (i) < (ii) Signup and view all the answers

What classification best describes the position of -Br in the compound CH3CH=CHC(Br)(CH3)2?

Allyl Signup and view all the answers

Which of the following reactions produces chlorobenzene?

Benzene + Cl2 in the presence of AlCl3 Signup and view all the answers

Which of the following compounds has an asymmetric carbon atom identified with an asterisk (*)?

(i), (iii), and (iv) Signup and view all the answers

Study Notes

Alcohol Reactivity with Halogen Acids

Alcohol reactivity order: (c) > (b) > (a).
Specific alcohol CH3CH2-CH2-OH can yield alkyl chloride with concentrated HCl at room temperature.

Reactions of Toluene

Toluene + halogen in presence of FeCl3 produces ortho and para halo compounds.
This interaction is classified as an electrophilic substitution reaction.

Halogen Exchange Reaction

Example of halogen exchange reaction: RX + Nal → Rl + NaX.

Alkyl Halide Reactions

Reaction pathways:
- Primary alkyl halides prefer SN2 reaction.
- Tertiary alkyl iodide (CH3)3C-I undergoes SN1 reaction most readily due to stable carbocation formation.

IUPAC Nomenclature

Correct IUPAC names:
- Compound identified as 1-Bromo-2-methylbutane (c).
- Compound identified as 3-Bromopentane (b).

Molecular Characteristics and Chirality

Molecules with mirror images that are non-superimposable are termed chiral.
2-Bromobutane is identified as chiral.
Recognition of asymmetric carbon atoms within certain molecules is key to understanding chirality.

Mechanisms and Assertions

SN2 reactions involve an inversion of configuration and occur in a single step.
Bromine addition to alkenes is classified as electrophilic addition.
Vinyl chloride is less reactive in nucleophilic substitution compared to ethyl chloride due to structural influences.
Ethanol yields iodoform test; methanol does not, based on reactivity differences.
Nucleophilic substitution reactions feel the influence of ambident nucleophiles, such as cyanide ions.

Notable Observations

The stability of carbocations influences the reaction pathways and outcomes in substitution reactions.
Reaction conditions, such as the presence of light or special catalysts, affect the reactions of compounds like toluene and alkyl halides.

Assertion and Reason Relationship Insights

Some interactions (like chloroethane with AgCN) lead to unexpected products based on nucleophilic properties.
Assertions and reasoning should be critically evaluated, as some explanations may not directly correlate with the observations.

Use these notes to strengthen your understanding of organic chemistry reactions, mechanisms, reactivity trends, and the importance of structure in molecular behavior.

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Description

Test your knowledge on organic chemistry reactions with this quiz covering various types of halides and substitution reactions. Questions include identifying attacking species and the nature of alkyl halides. See how well you understand key concepts in organic chemistry.