30 Questions
Which of the following solvents would favour the SN1 mechanism?
Non-polar aprotic solvents
What is the order of nucleophilicity among halide ions?
I– > Br– > Cl– > F–
What is the major product of an SN1 reaction?
A racemic mixture
Which of the following is an example of an elimination reaction?
Reaction of an alkyl halide with NaOH
What is the mechanism of nuclear halogenation?
Electrophilic substitution ID mechanism
What is the primary reason for the reactivity of the halogen atom in allyl halides?
Due to the ionisation to yield a carbonium ion which can stabilize by resonance
What type of reactions occur with NaOH and KCN?
Nucleophilic substitution reactions
What is the correct order of reactivity of alkyl halides?
Iodide > Bromide > Chloride
What is the effect of resonance stabilization on the carbon-chlorine bond in vinyl chloride?
It gives the bond some double bond character
What is the reaction that involves the conversion of an alkene to an alcohol?
Hydrolysis of alkyl bromide
What is the difference in the bond length of carbon-halogen bonds in vinyl chloride and alkyl halides?
The bond length is shorter in vinyl chloride
What type of hybridization is present in the carbon atom in allyl halides?
sp2 hybridization
What is the type of reaction where the C δ site is susceptible to attack by nucleophiles?
Nucleophilic substitution reaction
What is the reason for the high reactivity of alkyl halides?
Due to the large difference in the electronegativities of carbon and halogen atoms
What is the reaction that involves the formation of a dihalide?
Swart reaction
What is the effect of bulky groups in the formation of transition state?
Causes steric hindrance
What is the order of reactivity among alkyl halides with different halogens?
RI > RBr > RCl
What is the product of the reaction between an alkyl halide and sodium acetylide?
Alkyne
What is the result of the reaction between an alkyl halide and sodium sulphide?
Formation of a thioether
What is the effect of heat on the reaction of alkyl halides?
Forms an alkene
What is the primary mechanism by which alkyl halides undergo reduction with nascent hydrogen?
Hydrogenation
What is the effect of inductive effect in elimination reactions?
It propagates the positive charge to the neighbouring carbon atoms
What is the product formed when alkyl halides undergo Friedel-Craft's reaction with benzene?
Alkylbenzene
What is the condition required for further halogenation of alkyl halides?
Presence of sunlight, heat energy or peroxide
What is the similarity between alkyl lithiums and Grignard reagents?
They are both reactive reagents
What is the reason for the formation of a small negative charge on the halogen atom in alkyl halides?
Due to the high electronegativity of the halogen atom
Which of the following reaction mechanisms is characterized by the formation of a transition state?
Both SN1 and SN2
What is the result of the reaction between an alkyl halide and sodium or potassium hydrogen sulphide?
Formation of a thioalcohol or alkanethiol
Which of the following reactions is an example of a nucleophilic substitution reaction?
Reaction between an alkyl halide and ammonia
What is the order of reactivity of primary alkyl halides?
CH3X > C2H5X > C3H7X
This quiz covers the principles of nucleophilic substitution reactions, including the reactivity of halides towards SN1 and SN2 mechanisms, the effects of solvents and nucleophile concentration, and the resulting products.
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