Alkyl and Aryl Halides — practice questions
96 curated practice questions from Alkyl and Aryl Halides (Chemistry JEE Advanced, NTA Exams) — 89 hard, 7 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- Debromination of mesodibromobutane will give the product as :
- Consider the following S N Ar treaction + CH _ 3 ONa Heat The correct statement is (are)
- Br _ 2 + H _ 2 O Product :
- Assertion : CH 3 – CH 2 – Cl + NaI Acetone CH 3 – CH 2 – I + NaCl ↓ Reason : Acetone is polar Aprotic solvent and…
- Which of the following bases would give the best yield for the substitution product when reacted with 2-chloropropane ?
- Assertion : Chlorination of allylic hydrogen is difficult than vinylic hydrogen. Reason : Allyl radical is stabilised…
- For the reaction sequence given below, the correct statement(s) is(are) (In the options, X is any atom other than…
- Assertion : Chloral reacts with phenyl chloride to form DDT. Reason : It is an electrophilic substitution reaction
- What is the product of the reaction of the following compound with alcoholic potassium hydroxide ?
- An S N 2 reaction of an asymmetric carbon of a compound always gives (2001)
- Arrange the following in increasing order of reactivity in aromatic nucleophilic substitution reaction. (I) (II) (III)…
- Addition of X 2 on alkene is electrophilic addition reaction. Reaction proceed through the formation of 3-membered…
- Assertion : Treatment of chloroethane with a saturated solution of AgCN gives ethyl isocyanide as the major product…
- Addition of X 2 on alkene is electrophilic addition reaction. Reaction proceed through the formation of 3-membered…
- An S N 2 reaction at an asymmetric carbon of a compound always gives [2001]
- Among the following the most reactive towards alcoholic KOH is
- C Ag _ 2 O (moist) D [ Zn + H _ 2 O ] O _ 3 E + F
- Which of the following statements correctly describes(s) E1 reactions of alkyl halides (RX) ?
- Which of the following compounds will not give S N 2 reaction?
- The conversion of 2, 3-dibromobutane to 2-butene with Zn and alcohol is
- Which of the following are arranged in the decreasing order of dipole moment ?
- Which of the following compounds will give S N 1 reaction?
- Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with NaI in acetone. Reason : NaCl/NaBr are…
- In the following reaction sequence, the correct structure(s) of X is (are) X array l 1) PBr _ 3 , Et _ 2 O 2) NaI _ 1…
- In which product formation takes place according to Hofmann’s rule?
- Match the reactions in List-I with the features of their products in List-II and choose the correct option. (2023)
- Reactant [- HCl ] alc. KOH ( E 2) Which of the following molecule(s) is/are suitable reactant ?
- A Br _ 2 / hv ~B [ Et _ 2 O ] Mg D [ ] Conc. H _ 2 SO _ 4 E O _ 3 / Zn + H _ 2 O Find out the structure of ‘A’ :
- Which plastic is obtained from CHCl _ 3 as follows CHCl _ 3 [ SbF _ 3 ] H X BOO ^ C Y Polymerisation Plastic
- Which of the following pair is correctly matched with major products ? Reaction Product
- Which of the following phrases are correctly linked with S N 1 reaction ?
- C 6 H 6 Cl 6 , on treatment with alcoholic KOH, yields
- When but –3- en -2- ol reacts with aq. HBr, the product formed is
- In the given reaction the products formed can be
- Assertion : Heavy metal ions Ag + or Pb 2+ decrease S N 1 reactivity. Reason : They aid ionisation of RX.
- Assertion : Treatment of (+)-2-chlorobutane with aqueous NaCN gives laevo rotatory product. Reason : S N 2 reaction…
- Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene…
- The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methyl butane is :
- Aliphatic nucleophilic substitution is mainly of two type S N 1 and S N 2 . S N 2 reaction proceed with strong…
- Consider the following reaction X and Y are respectively
- Which of the following compounds give alcohol on reaction with RMgX ?
- Identify (Z) in the following reaction
- Assertion : Benzyl bromide when kept in acetone - water, produces benzyl alcohol. Reason : The reaction follows S N 2…
- Assertion : Rate of ethanolysis of 1 o halide ( ) by S N 1 mechanism is fast. Reason : Carbocation is stabilised by…
- Assertion : Tertiary haloalkanes are more reactive than primary haloalkanes towards elimination reactions. Reason : The…
- Assertion : 1 o allylic halides are more reactive than 1 o RX in S N 1 reaction. Reason : Allylic carbocation…
- Aliphatic nucleophilic substitution is mainly of two type S N 1 and S N 2 . S N 2 reaction proceed with strong…
- Identify the set of reagents/reaction conditions X and Y in the following set of transformations (2002)
- Aliphatic nucleophilic substitution is mainly of two type S N 1 and S N 2 . S N 2 reaction proceed with strong…
- Which of the following represents the correct order of densities ?
- Assertion : Wurtz’s coupling reaction of alkyl halide is not suitable for an alkane containing an odd number of carbons…
- Assertion : E 1 cb reaction is favoured by stabilisation of carbanion and poor leaving group. Reason : The reaction is…
- CCl 4 is a well known fire extinguisher. However after using it to extinguish fire, the room should be well ventilated…
- Aliphatic nucleophilic substitution is mainly of two type S N 1 and S N 2 . S N 2 reaction proceed with strong…
- Among the following, the molecule with the highest dipole moment is (2003)
- An organic compound C 3 H 7 Br(A) with alcoholic KOH forms C 3 H 6 which decolorises Br 2 in CCl 4 but does not gives a…
- Which of the following reactions involve free radical as intermediate ?
- Assertion : p-nitrochlorobenzene is more reactive than m-nitrochlorobenzene towards aromatic nucleophilic substitution…
- Which of the following is (are) true regarding intermediate in the addition-elimination mechanism of the reaction below…
- A solution of (+)-2-chloro-2-phenylethane in toluene racemises slowly in the presence of small amount of SbCl 5 , due…
- Assertion : The carbon halogen bond in an aryl halide is shorter than the carbon halogen bond in an alkyl halide…
- p–nitrofluorobenzene is more reactive than its meta isomer in S N Ar reaction with CH 3 ONa because
- array l [I] [II] array Choose the correct statements about molecule I and II.
- Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due to
- Assertion : In S N 1 mechanism, the product with inversion of configuration is obtained in higher amount compared to…
- Cl _ 2 + H _ 2 O Major product :
- Assertion : S N 2 reaction of CH 3 ––Br is faster in DMSO than in H 2 O. Reason : DMSO has greater capability to…
- Assertion : Rate of reaction is dependent only on the concentration of nucleophile in S N 1 reactions. Reason : Polar…
- Which of the following has the highest nucleophilicity ? [2000]
- Which of the following alkanes cannot be synthesized by the Wurtz reaction in good yield ?
- Which of the following statements is correct about retention/invertion of configuration during the course of a reaction?
- Propyl benzene reacts with bromine in presence of light or heat to give
- Which of the following alkyl halides is not suitable for Corey-House synthesis of alkanes ?
- KI in acetone, undergoes S N 2 reaction with each of P , Q , R and S . The rates of the reaction vary as
- Based on the above observation, which flask will have the largest amount of 1-hexene?
- What would be the product formed when 1-Bromo-3-chloro cyclobutane reacts with two equivalents of metallic sodium in…
- When phenyl magnesium bromide reacts with t-butanol, the product would be (2005)
- The order of reactivities of the following alkyl halides for a S N 2 reaction is [2000]
- The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to
- Assertion : The presence of nitro group facilitates nucleophilic substitution reaction in aryl halides. Reason : The…
- For the following compounds, the correct statement(s) with respect to nucleophilic substitution reactions is (are)…
- Which is the major product of the reaction of 2, 4–dinitrochlorobenzene with methylamine ?
- The IUPAC name(s) of the following compound is(are)
- Assertion : A dichlorobenzene is slightly more reactive than chlorobenzene towards an aromatic nucleophilic…
- The compound most reactive towards S N 1 reaction is
- The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In…
- Assertion : Ph–CO–CH 2 CH 2 OCH 3 has greater reactivity for E1cB than for E2 reaction. Reason : A poor leaving group…
- Which chloroderivative of nitrobenzenes among the following would undergo hydrolysis, most readily with aqueous NaOH ?
- Grignard reagent is usually prepared by R - X + Mg Et _ 2 O RMgX Grignard reagent Ar - X + Mg Et _ 2 O ArMgX Grignard…
- Mark out the possible product.
- The major product of the following reaction is (2008)
- Aliphatic nucleophilic substitution is mainly of two type S N 1 and S N 2 . S N 2 reaction proceed with strong…
- This reaction would follow which of the following pathway predominantly ?
- A compound ‘A’ has molecular formula C 5 H 9 Cl. It does not react with bromine in CCl 4 . On treatment with strong…
- Aliphatic nucleophilic substitution is mainly of two type S N 1 and S N 2 . S N 2 reaction proceed with strong…
- Which of the following undergoes E2 elimination in the presence of a strong base to yield one product ?