Organic Compounds with Halogens Practice Questions
JEE · Chemistry · 1173 free MCQs with instant results and detailed explanations.
1173
Total
261
Easy
524
Medium
388
Hard
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Topics in Organic Compounds with Halogens
SN1 and SN2 Reactions
229
Elimination Reactions
251
Polyhalogen Compounds
214
Aryl Halides
253
Alkyl Halides
226
Sample Questions from Organic Compounds with Halogens
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary type of hybridization present in the carbon atom of alkyl halides?
A.
sp3
B.
sp2
C.
sp
D.
dsp3
Show Answer & Explanation
Correct Answer: A
In alkyl halides, the carbon atom is bonded to four other atoms (three hydrogen and one halogen), leading to sp3 hybridization.
Q2
Easy
Which of the following alkyl halides is most reactive in nucleophilic substitution reactions?
A.
CH3Cl
B.
C2H5Br
C.
C3H7I
D.
C4H9F
Show Answer & Explanation
Correct Answer: C
C3H7I (iodopropane) is most reactive due to the weaker C-I bond compared to C-Br and C-Cl bonds.
Q3
Easy
Which alkyl halide would you expect to have the lowest boiling point?
A.
C2H5Cl
B.
C2H5Br
C.
C2H5I
D.
C2H5F
Show Answer & Explanation
Correct Answer: D
C2H5F has the lowest boiling point due to lower molecular weight and weaker van der Waals forces compared to other halides.
Q4
Medium
Which of the following is the best nucleophile among the given alkyl halides?
A.
CH3Cl
B.
CH3Br
C.
C2H5Cl
D.
C2H5Br
Show Answer & Explanation
Correct Answer: B
Bromine is a better leaving group than chlorine due to its larger size and better ability to stabilize negative charge, making CH3Br a stronger nucleophile.
Q5
Medium
What is the major product of the reaction between 1-bromobutane and sodium hydroxide in ethanol?
A.
Butan-1-ol
B.
Butan-2-ol
C.
Butyl bromide
D.
Butanoic acid
Show Answer & Explanation
Correct Answer: B
The reaction is an elimination reaction (E2) in the presence of a strong base like sodium hydroxide, leading to the formation of Butan-2-ol as the major product due to more stable secondary carbocation formation.
Q6
Medium
Which of the following statements about alkyl halides is incorrect?
A.
Alkyl halides can undergo nucleophilic substitution reactions.
B.
Alkyl halides are more reactive than alkanes.
C.
Iodides are generally better leaving groups than bromides.
D.
Alkyl halides cannot participate in elimination reactions.
Show Answer & Explanation
Correct Answer: D
Alkyl halides can participate in elimination reactions, such as E2 or E1, thus making option D incorrect.
Q7
Medium
Which of the following alkyl halides will undergo nucleophilic substitution the fastest?
A.
1-bromopropane
B.
2-bromopropane
C.
3-bromopropane
D.
ethyl bromide
Show Answer & Explanation
Correct Answer: C
Tertiary alkyl halides are more reactive towards nucleophilic substitution due to steric hindrance and stability of the carbocation formed.
Q8
Hard
Which of the following alkyl halides will undergo nucleophilic substitution via a bimolecular mechanism (SN2) most readily?
A.
1-chloropropane
B.
2-bromobutane
C.
3-chloro-3-methylpentane
D.
1-bromo-2-methylpropane
Show Answer & Explanation
Correct Answer: A
1-chloropropane is a primary alkyl halide, which is more favorable for SN2 reactions compared to secondary and tertiary halides due to steric hindrance.
Q9
Hard
What is the major product when 1-bromo-2-methylpropane undergoes elimination with a strong base like potassium tert-butoxide?
A.
1-methylcyclobutene
B.
2-methylpropene
C.
3-methylbutene
D.
1-bromo-2-methylpropane remains unchanged
Show Answer & Explanation
Correct Answer: B
The base induces elimination, favoring the formation of the more stable alkene, which in this case is 2-methylpropene.
Q10
Hard
Which reaction will lead to the formation of an alcohol from an alkyl halide most effectively?
A.
Hydrolysis of 2-bromobutane with water
B.
Reduction of 1-bromoethane with lithium aluminum hydride
C.
Dehydrohalogenation of 2-chloropropane
D.
Hydrogenation of bromoethene
Show Answer & Explanation
Correct Answer: A
Hydrolysis of 2-bromobutane with water will lead to the nucleophilic substitution forming an alcohol efficiently.
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Organic Compounds with Halogens — JEE Chemistry Practice Questions Online
This page contains 1173 practice MCQs for the chapter Organic Compounds with Halogens in JEE Chemistry. The questions are organized by difficulty — 261 easy, 524 medium, 388 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.