NEET Haloalkanes and Haloarenes — Set 5

Question 1

Which halide on reaction with $ \ce{KOH} $ in water forms $ \ce{CH3CH(OH)CH2CH2CH3} $?

Accepted Answer

Aqueous $ \ce{KOH} $ substitutes Cl in $ \ce{CH3CHClCH2CH2CH3} $ (2-chloropentane) via $ \ce{S_N2} $ to form 2-pentanol ($ \ce{CH3CH(OH)CH2CH2CH3} $).

Question 2

How many structural isomers are possible for $ \ce{C4H9Cl} $?

Accepted Answer

For $ \ce{C4H9Cl} $, the isomers are 1-chlorobutane, 2-chlorobutane, 1-chloro-2-methylpropane, and 2-chloro-2-methylpropane, totaling 4.

Question 3

What is the product when $ \ce{CH3CH2CH2Br} $ reacts with $ \ce{NH3} $ (excess)?

Accepted Answer

Excess $ \ce{NH3} $ reacts with $ \ce{CH3CH2CH2Br} $ via nucleophilic substitution to form the primary amine $ \ce{CH3CH2CH2NH2} $ (propylamine).

NEET Chemistry: Haloalkanes and Haloarenes — Practice Set 5

Q1. Which halide on reaction with \( \ce{KOH} \) in water forms \( \ce{CH3CH(OH)CH2CH2CH3} \)?

Q2. How many structural isomers are possible for \( \ce{C4H9Cl} \)?

Q3. What is the product when \( \ce{CH3CH2CH2Br} \) reacts with \( \ce{NH3} \) (excess)?

Q4. Which reaction produces a mixture of 1-chloropropane and 2-chloropropane?

Q5. Which of the following is a secondary alkyl halide?

Q6. Which of the following is a benzylic halide?

Q7. Which compound is formed when benzene reacts with \( \ce{Cl2} \) in sunlight?

Q8. How many monobromo derivatives are possible for \( \ce{CH3CH2CH2CH3} \)?

Q9. What is the product when \( \ce{CH3CH2OH} \) reacts with \( \ce{PBr3} \)?

Q10. Which of the following undergoes \( \ce{S_N2} \) substitution most readily?