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Haloalkanes and Haloarenes — NEET UG Chemistry PYQs

489 previous year questions from Haloalkanes and Haloarenes with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

489 questionsChemistrySolutions on every page
1

Which of the following reactions can convert chlorobenzene into toluene?

MHT CET Medical 2026 Solution View → 2

Identify best method for preparation of Alkyl fluoride from following

MHT CET Medical 2026 Solution View → 3

Identify the chemical name of the commonly used refrigerant Freon 12

MHT CET Medical 2026 Solution View → 4

Which of the following alkyl halides gives a mixture of alkenes on dehydrohalogenation?

MHT CET Medical 2026 Solution View → 5

Which order of kinetics is followed by the reaction between tert-butyl bromide and hydroxide ion to give tert-Butyl alcohol?

MHT CET Medical 2026 Solution View → 6

Above reaction is known as

MHT CET Medical 2026 Solution View → 7

Which of the following product obtained when alkyl chloride react with aq KOH at room temperature?

MHT CET Medical 2026 Solution View → 8

Chlorobenzene reacts with Mg in dry ether to give a compound A, which further reacts with ethanol to give B. Identify B.

MHT CET Medical 2026 Solution View → 9

Which of the following is not an allylic halide?

MHT CET Medical 2026 Solution View → 10

What is the correct order of reactivity of haloalkanes towards -elimination reaction?

MHT CET Medical 2026 Solution View → 11

What type of halide, the compound C ₆ H ₅ CH ₂ Br , is?

MHT CET Medical 2026 Solution View → 12

Identify the A and B in the following reactions in alcoholic medium. RX + AgCN A + AgX RX + KCN B + KX

MHT CET Medical 2026 Solution View → 13

What is the main product obtained when sodium ethoxide reacts with isopropyl chloride?

MHT CET Medical 2026 Solution View → 14

Which of the following compounds forms isopropyl cyanide?

MHT CET Medical 2026 Solution View → 15

Which of the following is the correct structure of DDT ?

MHT CET Medical 2026 Solution View → 16

One of the products formed in the following reaction is

NEET 2026 Solution View → 17

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : undergoes S _ N 2 reaction faster than Reason (R) : Iodin

NEET 2025 Solution View → 18

How many products (including stereoisomers) are expected from monochlorination of the following compound?

NEET 2025 Solution View → 19

The following reaction method is not suitable for the preparation of the corresponding haloarene products, due to high reactivity of halogen, when X is :

NEET 2024 Solution View → 20

Which of the following is not correct?

JIPMER 2019 Solution View → 21

CH ₃- CH ₂- CH ₂- Br Alc. KOH Final product is

JIPMER 2019 Solution View → 22

What is the product of the above reaction?

JIPMER 2018 Solution View → 23

Among the following, the suitable reagent for Wurtz reaction is

JIPMER 2018 Solution View → 24

In the following conversion, Identify ' A ' from the following option

JIPMER 2016 Solution View → 25

When 2-methyl butyl bromide is treated with sodium ethoxide in ethanol, what will be the major product?

JIPMER 2016 Solution View → 26

R- CH ₂- CH ₂- OH can be converted into R CH ₂ CH ₂ COOH by the following sequence of steps.

JIPMER 2015 Solution View → 27

Which one of the following does not undergo iodoform reaction?

JIPMER 2014 Solution View → 28

The above reaction is known as

JIPMER 2013 Solution View → 29

In electrophilic aromatic substitution reaction, the nitro group is meta directing because it

JIPMER 2011 Solution View → 30

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with

JIPMER 2011 Solution View → 31

t -butyl chloride preferably undergo hydrolysis by

JIPMER 2009 Solution View → 32

Iodoform gives a precipitate with AgNO ₃ on heating but chloroform does not because

JIPMER 2009 Solution View → 33

CH ₃ CHCl ₂ , on hydrolysis, will give

JIPMER 2004 Solution View → 34

Which metallic fluorides are suitable for the synthesis of alkyl fluorides?

NEET Solution View → 35

What is the result of the reaction between Grignard reagents and water?

NEET Solution View → 36

In which type of solvent is the Wurtz-Fittig reaction typically carried out?

NEET Solution View → 37

What type of charge is typically found on the carbon atom bonded to halogen in a haloalkane?

NEET Solution View → 38

What is the configuration of the carbon atom under attack in the transition state of an S N 2 reaction?

NEET Solution View → 39

Why is it less likely for the electron-rich nucleophile to approach electron-rich arenes?

NEET Solution View → 40

Who is credited with the discovery of alkyl magnesium halides, often referred to as Grignard Reagents?

NEET Solution View → 41

What is the physical state of higher members of organic halogen compounds at room temperature?

NEET Solution View → 42

What is the role of hydroxide ion in the reaction with CH 3 Cl?

NEET Solution View → 43

What is the consequence of freon's presence in the stratosphere?

NEET Solution View → 44

At what temperature is chlorobenzene converted into phenol when using aqueous sodium hydroxide solution?

NEET Solution View → 45

Which class of compounds serves as substrates in nucleophilic substitution reactions?

NEET Solution View → 46

How are alkyl iodides often prepared?

NEET Solution View → 47

What effect does the presence of a nitro group (-NO 2 ) at the ortho- and para-positions have on the reactivity of haloarenes?

NEET Solution View → 48

What is the hybridization of the carbon atom attached to halogen in haloalkanes?

NEET Solution View → 49

What is the hybridization of the carbon atom attached to halogen in haloarenes?

NEET Solution View → 50

What is the solvent used in the Wurtz reaction?

NEET Solution View → 51

How does the presence of a halogen atom affect the reactivity of haloarenes compared to benzene?

NEET Solution View → 52

What did Louis Pasteur observe about the optical rotation of solutions of mirror-image crystals?

NEET Solution View → 53

Who discovered the effectiveness of DDT as an insecticide?

NEET Solution View → 54

Why do haloalkanes tend to dissolve in organic solvents?

NEET Solution View → 55

What is the most common effect of exposure to carbon tetrachloride?

NEET Solution View → 56

What is the effect of introducing an electron-withdrawing group at the meta-position in haloarenes?

NEET Solution View → 57

What is the effect of greater s-character in carbon on electronegativity?

NEET Solution View → 58

What is the order of reactivity of alcohols with a given haloacid?

NEET Solution View → 59

What is the reason for the instability of the phenyl cation in haloarenes?

NEET Solution View → 60

What is the main reason for the low yield of any single compound in the free radical chlorination or bromination of alkanes?

NEET Solution View → 61

What character does the C-Cl bond acquire in haloarenes due to resonance?

NEET Solution View → 62

Why do para-isomers have higher melting points compared to ortho- and meta-isomers?

NEET Solution View → 63

Why is the C—Cl bond length shorter in haloarenes compared to haloalkanes?

NEET Solution View → 64

What is a compound called if it rotates the plane of plane-polarized light to the left (anticlockwise direction)?

NEET Solution View → 65

What type of reactions do haloarenes undergo with the benzene ring?

NEET Solution View → 66

What problems began to arise in the late 1940s related to the extensive use of DDT?

NEET Solution View → 67

What are groups like cyanides and nitrites called due to their possession of two nucleophilic centers?

NEET Solution View → 68

What is the primary reason for the slow electrophilic substitution reactions in haloarenes compared to benzene?

NEET Solution View → 69

What happens when a haloalkane with a β-hydrogen atom is heated with an alcoholic solution of potassium hydroxide?

NEET Solution View → 70

How are good yields of alkyl iodides (R—I) obtained?

NEET Solution View → 71

Which type of alkyl halide reacts most rapidly in S N 2 reactions?

NEET Solution View → 72

What are the two methods for preparing alkyl chloride?

NEET Solution View → 73

What is the result of reacting an alkene with hydrogen chloride, hydrogen bromide, or hydrogen iodide?

NEET Solution View → 74

What happens when carbon tetrachloride is released into the air?

NEET Solution View → 75

What is the specific type of charge found on nucleophiles?

NEET Solution View → 76

When does a reaction proceed with retention of the configuration?

NEET Solution View → 77

What is the color change observed when bromine is added to an alkene in CCl 4 ?

NEET Solution View → 78

What are aryl chlorides and bromides easily prepared by?

NEET Solution View → 79

What are the products of the reaction between CH 3 Cl and hydroxide ion?

NEET Solution View → 80

How many contributing structures does the cyanide group possess?

NEET Solution View → 81

What are some of the substances for which chloroform is employed as a solvent?

NEET Solution View → 82

Why do electrophilic substitution reactions in haloarenes require more drastic conditions compared to benzene?

NEET Solution View → 83

What type of mechanism is ruled out for haloarenes due to the instability of the phenyl cation?

NEET Solution View → 84

What is the term for compounds that rotate the plane of plane-polarized light when passed through a Nicol prism?

NEET Solution View → 85

What effect do bulky substituents have on the rate of S N 2 reactions?

NEET Solution View → 86

How is the reaction with primary and secondary alcohols with HCl typically carried out?

NEET Solution View → 87

What is the term used to describe the reaction of heating alkyl chlorides/bromides in the presence of metallic fluoride?

NEET Solution View → 88

What factor makes attractions between molecules stronger?

NEET Solution View → 89

How does the nitrite ion act as an ambident nucleophile?

NEET Solution View → 90

What is formed in step I of the reaction between tert-butyl bromide and hydroxide ion?

NEET Solution View → 91

Among primary, secondary, and tertiary halides, which is the least reactive in S N 2 reactions?

NEET Solution View → 92

What is the initial reactant in the Sandmeyer's reaction for preparing haloarenes?

NEET Solution View → 93

What is the pressure required for the conversion of chlorobenzene to phenol?

NEET Solution View → 94

Is an intermediate formed in an S N 2 reaction?

NEET Solution View → 95

What physical properties are identical in enantiomers?

NEET Solution View → 96

What symptoms can occur with higher levels of methylene chloride exposure in the air?

NEET Solution View → 97

What is the relationship between the rotation of plane-polarized light of one enantiomer and the other?

NEET Solution View → 98

What type of solution is required for the primary aromatic amine in Sandmeyer's reaction?

NEET Solution View → 99

How do enantiomers differ from each other?

NEET Solution View → 100

What is one of the main reasons for the increased use of DDT after World War II?

NEET Solution View → 101

Why do the boiling points of chlorides, bromides, and iodides of organic compounds tend to be higher than those of hydrocarbons with comparable molecular mass?

NEET Solution View → 102

Which step of the reaction is the slowest and reversible?

NEET Solution View → 103

How does the energy required to dissolve haloalkanes in water compare to the energy released when new attractions are formed with water molecules?

NEET Solution View → 104

What happens to chloroform when it is slowly oxidized by air in the presence of light?

NEET Solution View → 105

What is the product of the reaction between tert-butyl bromide and hydroxide ion in an S N 1 reaction?

NEET Solution View → 106

What type of compounds are Grignard Reagents?

NEET Solution View → 107

Which positions do electrophilic substitutions occur with respect to the halogen atom in haloarenes?

NEET Solution View → 108

What are the chlorofluorocarbon compounds of methane and ethane collectively known as?

NEET Solution View → 109

What is the order of reactivity for halides (R-X) of a given alkyl group in both mechanisms (S N 1 and SN N )?

NEET Solution View → 110

What is the nature of the magnesium halogen bond in the Grignard reagent?

NEET Solution View → 111

What type of species are nucleophiles?

NEET Solution View → 112

In what type of solvents are S N 1 reactions generally carried out?

NEET Solution View → 113

What is the purpose of adding bromine in CCl 4 to an alkene in the laboratory?

NEET Solution View → 114

What happens to the carbon-halide bond in an S N 2 reaction?

NEET Solution View → 115

What term is used to describe the spatial arrangement of atoms in the molecules of two types of crystals, according to Louis Pasteur?

NEET Solution View → 116

What happens to the three carbon-hydrogen bonds of the substrate during the progress of an S N 2 reaction?

NEET Solution View → 117

What is the term for a carbon atom that is not chiral and can be superimposed on its mirror image?

NEET Solution View → 118

How is Freon 12 (CCl 2 F 2 ) manufactured?

NEET Solution View → 119

What is the result of β-elimination?

NEET Solution View → 120

What is the reason for the ease of separation of ortho and para isomers?

NEET Solution View →
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