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JEE Mains · Chemistry · STD 12 - 7. Alcohol, phenol and ethers

निम्न यौगिकों के लिए \(\mathrm{pK}_{\mathrm{a}}\) मानों का सही क्रम है :

  1. A \(c > a > d > b\)
  2. B \(b > d > a > c\)
  3. C \(b > a > d > c\)
  4. D \(a > b > c > d\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(b > d > a > c\)

Step-by-step Solution

Detailed explanation

Due to \(- M\) effect of \(- NO _2\) group, it increases acidity \(+ M\) effect of \(N \left( CH _3\right)_2\) decreases acidity. Hyperconjugation of isopropyl decrease acidity \(\therefore\) order of acidic strength \((c) > (a) > (d) > (b)\)
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