NEET Haloalkanes and Haloarenes — Set 3

Question 1

Which halide is formed when benzene undergoes electrophilic substitution with chlorine in the presence of a Lewis acid?

Accepted Answer

Electrophilic substitution of benzene with chlorine and a Lewis acid (e.g., $ \ce{FeCl3} $) replaces a hydrogen with chlorine, forming chlorobenzene ($ \ce{C6H5Cl} $).

Question 2

What is the IUPAC name of the compound $ \ce{CH3CH2CH(Cl)CH3} $?

Accepted Answer

The compound has a four-carbon chain with a chlorine atom on the second carbon. The parent chain is butane, and the chlorine is a substituent, so the name is 2-chlorobutane.

Question 3

What is the product when $ \ce{CH3CH2CH2Br} $ reacts with $ \ce{NaCN} $ in DMSO?

Accepted Answer

$ \ce{NaCN} $ in DMSO (polar aprotic solvent) substitutes Br in $ \ce{CH3CH2CH2Br} $ via $ \ce{S_N2} $, forming $ \ce{CH3CH2CH2CN} $ (butanenitrile).

NEET Chemistry: Haloalkanes and Haloarenes — Practice Set 3

Q1. Which halide is formed when benzene undergoes electrophilic substitution with chlorine in the presence of a Lewis acid?

Q2. What is the IUPAC name of the compound \( \ce{CH3CH2CH(Cl)CH3} \)?

Q3. What is the product when \( \ce{CH3CH2CH2Br} \) reacts with \( \ce{NaCN} \) in DMSO?

Q4. Which reagent converts ethanol to ethyl bromide with \( \ce{H2SO4} \)?

Q5. Which nucleophile converts \( \ce{CH3CH2CH2I} \) to \( \ce{CH3CH2CH2OC(CH3)3} \) in a polar aprotic solvent?

Q6. How many monobromo isomers are possible for \( \ce{CH3CH2CH(CH3)CH3} \)?

Q7. Which reagent reacts with \( \ce{CH3CH2CH2CH2CH2OH} \) to produce \( \ce{CH3CH2CH2CH2CH2Br} \) and a phosphorus-containing byproduct?

Q8. Which of the following is a primary halide?

Q9. What is the IUPAC name of \( \ce{CH3CH2CH2CH(Cl)CH3} \)?

Q10. Which halide reacts with \( \ce{Na} \) in ether to produce \( \ce{CH3CH2CH2CH2CH3} \) as the major product?