Haloalkanes and Haloarenes Practice Questions
NEET · Chemistry · 1508 free MCQs with instant results and detailed explanations.
1508
Total
324
Easy
653
Medium
531
Hard
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Topics in Haloalkanes and Haloarenes
Elimination
373
SN1 and SN2 Reactions
378
Preparation
383
Properties
369
Sample Questions from Haloalkanes and Haloarenes
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following methods is commonly used for the preparation of haloalkanes from alkanes?
A.
Electrophilic substitution
B.
Halogenation
C.
Hydrogenation
D.
Dehydrohalogenation
Show Answer & Explanation
Correct Answer: B
Halogenation involves the reaction of alkanes with halogens in the presence of heat or light, leading to the formation of haloalkanes.
Q2
Easy
Bromobenzene can be prepared from phenol using which of the following reagents?
A.
Bromine and FeBr3
B.
HBr
C.
NaBr
D.
KBr
Show Answer & Explanation
Correct Answer: A
Bromobenzene can be synthesized from phenol using bromine in the presence of a Lewis acid like FeBr3, which facilitates electrophilic substitution.
Q3
Easy
Which reagent is used to convert an alcohol into a haloalkane?
A.
NaOH
B.
PCl5
C.
H2SO4
D.
NaH
Show Answer & Explanation
Correct Answer: B
PCl5 reacts with alcohols to form haloalkanes by replacing the hydroxyl group with a halogen atom.
Q4
Medium
Which of the following haloalkanes will have the highest boiling point?
A.
1-chlorobutane
B.
2-chlorobutane
C.
1-bromobutane
D.
1-iodobutane
Show Answer & Explanation
Correct Answer: D
1-iodobutane has the highest boiling point due to the larger size and polarizability of the iodine atom compared to chlorine and bromine, leading to stronger van der Waals forces.
Q5
Medium
What is the primary product of the reaction between 1-bromopropane and sodium iodide in acetone?
A.
1-iodopropane
B.
1-chloropropane
C.
2-iodopropane
D.
3-iodopropane
Show Answer & Explanation
Correct Answer: A
1-bromopropane reacts with sodium iodide in acetone to undergo an SN2 reaction, resulting in the formation of 1-iodopropane as the primary product.
Q6
Medium
Which of the following compounds undergoes hydrolysis the fastest?
A.
1-bromobutane
B.
1-chlorobutane
C.
2-bromobutane
D.
2-chlorobutane
Show Answer & Explanation
Correct Answer: C
2-bromobutane undergoes hydrolysis the fastest due to the stability of the carbocation formed after the initial breaking of the C-Br bond, which is more stable than primary carbocations.
Q7
Medium
In the context of haloarenes, which reaction is most commonly employed for the synthesis of aryl halides?
A.
Friedel-Crafts acylation
B.
Nucleophilic substitution
C.
Friedel-Crafts alkylation
D.
Halogenation of phenols
Show Answer & Explanation
Correct Answer: D
Halogenation of phenols is a common method for synthesizing aryl halides as it directly introduces halogens into the aromatic ring, making it a favored approach.
Q8
Hard
Which of the following methods can be used to prepare bromoalkanes from alkanes?
A.
Free radical halogenation
B.
Nucleophilic substitution
C.
Electrophilic addition
D.
Oxidation
Show Answer & Explanation
Correct Answer: A
Free radical halogenation is the primary method for preparing bromoalkanes from alkanes, as it involves the reaction of alkanes with bromine or bromine compounds under UV light, leading to the formation of bromoalkanes through radical intermediates.
Q9
Hard
Which reagent would most selectively convert propan-1-ol to 1-bromopropane?
A.
PBr3
B.
SOCl2
C.
NaBr and H2SO4
D.
Br2 in CCl4
Show Answer & Explanation
Correct Answer: A
PBr3 is highly effective for converting alcohols to alkyl bromides without rearrangements and with minimal by-products, making it the most selective reagent for transforming propan-1-ol into 1-bromopropane.
Q10
Hard
What is the expected major product when 2-bromopropane is treated with aqueous KOH?
A.
Propene
B.
Propan-2-ol
C.
1-Bromopropane
D.
2-Bromopropene
Show Answer & Explanation
Correct Answer: B
When 2-bromopropane is treated with aqueous KOH, the reaction favors nucleophilic substitution, leading to the formation of propan-2-ol, a result of hydroxide ion attacking the carbon bonded to bromine.
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Haloalkanes and Haloarenes — NEET Chemistry Practice Questions Online
This page contains 1508 practice MCQs for the chapter Haloalkanes and Haloarenes in NEET Chemistry. The questions are organized by difficulty — 324 easy, 653 medium, 531 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 4 topics, giving you comprehensive coverage of the entire chapter.