NEET Haloalkanes and Haloarenes — Set 11

Question 1

Which of the following undergoes nucleophilic substitution most readily via $ \ce{S_N1} $ mechanism?

Accepted Answer

$ \ce{S_N1} $ reactivity increases with carbocation stability. $ \ce{(CH3)3CCl} $ (tertiary) forms a stable tertiary carbocation, making it most reactive.

Question 2

What is the product when $ \ce{CH3CH2Br} $ reacts with $ \ce{KCN} $ in aqueous ethanol?

Accepted Answer

$ \ce{KCN} $ provides $ \ce{CN^-} $, which undergoes nucleophilic substitution with $ \ce{CH3CH2Br} $ to form $ \ce{CH3CH2CN} $ (propanenitrile).

Question 3

What is the product when $ \ce{CH3CH2CH2Cl} $ reacts with $ \ce{NaOCH2CH3} $ in ethanol?

Accepted Answer

$ \ce{NaOCH2CH3} $ substitutes Cl in $ \ce{CH3CH2CH2Cl} $ via $ \ce{S_N2} $, forming $ \ce{CH3CH2CH2OCH2CH3} $ (ethyl propyl ether).

NEET Chemistry: Haloalkanes and Haloarenes — Practice Set 11

Q1. Which of the following undergoes nucleophilic substitution most readily via \( \ce{S_N1} \) mechanism?

Q2. What is the product when \( \ce{CH3CH2Br} \) reacts with \( \ce{KCN} \) in aqueous ethanol?

Q3. What is the product when \( \ce{CH3CH2CH2Cl} \) reacts with \( \ce{NaOCH2CH3} \) in ethanol?

Q4. What is the IUPAC name of \( \ce{CH3CH(CH3)CH2Cl} \)?

Q5. Which reagent converts 1-propanol to 1-bromopropane with \( \ce{H2SO4} \)?

Q6. Which of the following is most reactive towards \( \ce{S_N2} \) substitution with \( \ce{CN^-} \)?

Q7. Which halide has the highest density among the following at room temperature?

Q8. Which of the following has the highest density?

Q9. Which condition enhances the yield of \( \ce{C6H4Cl2} \) from \( \ce{C6H6} \) with \( \ce{Cl2} \)?

Q10. What is the product of \( \ce{CH3CH2Cl} \) with \( \ce{AgCN} \)?