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Chemistry · PYQ NEET UG 2024

हिन्दी

Identify the correct reagents that would bring about the following transformation.

  1. (i) \( \text{BH}_3 \) (ii) \( \text{H}_2\text{O}_2 / \text{OH}^- \) (iii) alk. \( \text{KMnO}_4 \) (iv) \( \text{H}_3\text{O}^+ \)
  2. (i) \( \text{H}_2\text{O} / \text{H}^+ \) (ii) PCC
  3. (i) \( \text{H}_2\text{O} / \text{H}^+ \) (ii) \( \text{CrO}_3 \)
  4. (i) \( \text{BH}_3 \) (ii) \( \text{H}_2\text{O}_2 / \text{OH}^- \) (iii) PCC

Correct answer · Option 4

(i) \( \text{BH}_3 \) (ii) \( \text{H}_2\text{O}_2 / \text{OH}^- \) (iii) PCC

Explanation

Hydroboration-oxidation of the terminal alkene using \( \text{BH}_3 \) and \( \text{H}_2\text{O}_2 / \text{OH}^- \), followed by mild oxidation of the primary alcohol with PCC, yields the corresponding aldehyde.
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