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Haloalkanes and Haloarenes question

2024 · Q146
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Haloalkanes and Haloarenes question

2024 · Q146

NEETChemistryHaloalkanes and HaloarenesMCQ+4 / −1

Identify the major product C formed in the following reaction sequence :

CH3−CH2−CH2−I→NaCNA\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{I} \xrightarrow{\mathrm{NaCN}} \mathrm{A}CH3​−CH2​−CH2​−INaCN​A

⟶Partial hydrolysisOH−B⟶Br2NaOHC(major)\mathrm{\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Partial\,hydrolysis}^{O{H^ - }}} B\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{B{r_2}}^{NaOH}} \mathop C\limits_{(major)}}Partialhydrolysis⟶OH−​BBr2​⟶NaOH​(major)C​

  1. A
    propylamine
  2. B
    butylamine
  3. C
    butanamide
  4. D
    α\alphaα-bromobutanoic acid
View written solutionFree

Correct answer: A

NEET 2024 Chemistry - Haloalkanes and Haloarenes Question 5 English Explanation

$\bullet$ Step-l is $$\mathrm{S}_{\mathrm{N}}$$ reaction with $$\stackrel{\ominus}{\mathrm{C}} \mathrm{N}$$ nucleophile.

$\bullet$ Step-II will give amide.

$\bullet$ Step-III is Hoffmann bromamide degradation reaction.

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