NEET Haloalkanes and Haloarenes — Set 9

Question 1

What is the product when $ \ce{CH3CH2CHClCH2CH3} $ reacts with $ \ce{NaNH2} $ in liquid ammonia?

Accepted Answer

$ \ce{NaNH2} $ (strong base) promotes E2 elimination in $ \ce{CH3CH2CHClCH2CH3} $, forming $ \ce{CH3CH2CH=CHCH3} $ (2-pentene) per Zaitsev’s rule.

Question 2

What is the major product when $ \ce{CH3CH2CH2CH3} $ reacts with $ \ce{Br2} $ in UV light at 300°C?

Accepted Answer

Bromination of butane at high temperature favors the more stable secondary radical, forming $ \ce{CH3CHBrCH2CH3} $ (2-bromobutane) as the major product.

Question 3

Which compound is formed when aniline reacts with $ \ce{NaNO2} $ and $ \ce{HCl} $, followed by $ \ce{KI} $?

Accepted Answer

Aniline forms a diazonium salt with $ \ce{NaNO2} $ and $ \ce{HCl} $, which reacts with $ \ce{KI} $ to form $ \ce{C6H5I} $ (iodobenzene).

NEET Chemistry: Haloalkanes and Haloarenes — Practice Set 9

Q1. What is the product when \( \ce{CH3CH2CHClCH2CH3} \) reacts with \( \ce{NaNH2} \) in liquid ammonia?

Q2. What is the major product when \( \ce{CH3CH2CH2CH3} \) reacts with \( \ce{Br2} \) in UV light at 300°C?

Q3. Which compound is formed when aniline reacts with \( \ce{NaNO2} \) and \( \ce{HCl} \), followed by \( \ce{KI} \)?

Q4. Which of the following has the highest boiling point?

Q5. Which halide forms \( \ce{CH3CH2CH2CH=CH2} \) when treated with alcoholic \( \ce{KOH} \) at high temperature?

Q6. Which alkene reacts with \( \ce{HCl} \) to form a halide that gives \( \ce{CH3CH2CH=CH2} \) on elimination?

Q7. Which halide yields \( \ce{CH3CH2CH=CHCH2CH3} \) as the major product with alcoholic \( \ce{KOH} \) at 80°C?

Q8. How many chlorine atoms are present in the product when benzene reacts with excess \( \ce{Cl2} \) in sunlight?

Q9. Which of the following gives a yellow precipitate with \( \ce{AgNO3} \) in ethanol?

Q10. Which halide is most reactive with alcoholic \( \ce{KOH} \) to form an alkene?