WBJEE · Chemistry · Alcohols Phenols and Ethers
The correct acidity order of phenol (I), 4-hydroxybenzaldehyde (II) and 3-hydroxybenzaldehyde (III) is
- A \(I \lt II \lt III\)
- B \(I \lt III \lt II\)
- C \(II \lt III \lt I\)
- D \(III \lt II \lt I\)
Answer & Solution
Correct Answer
(B) \(I \lt III \lt II\)
Step-by-step Solution
Detailed explanation
\(\begin{array}{llll}\text { pKa } & 9.95 & 7.61 & 8.98\end{array}\) Acidic Strength \(II \gt III \gt I\) -CHO is electron withdrawing group which increases acidic strength of phenolic compound. Also withdrawing effect of -CHO is more through para position as compound to meta…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The measured freezing point depression for a \(0.1 \mathrm{m}\) aqueous \(\mathrm{CH}_{3} \mathrm{COOH}\) solution is \(0.19^{\circ} \mathrm{C}\). The acid dissociation constant \(K_{a}\) at this concentration will be (Given, \(K_{f}\) the molal cryoscopic constant \(=1.86 \mathrm{K}\) \(\mathrm{kg} \mathrm{mol}^{-1}\) )WBJEE 2013 Medium
- The reactive species in chlorine bleach isWBJEE 2019 Easy
- The molarity of a \(\mathrm{NaOH}\) solution by dissolving \(4 \mathrm{~g}\) of it in \(250 \mathrm{ml}\) water isWBJEE 2010 Medium
- The stable bivalency of \(\mathrm{Pb}\) and trivalency of \(\mathrm{Bi}\) isWBJEE 2012 Easy
- \(20 \mathrm{mL~} 0 .1\) (N) acetic acid is mixed with \(10 \mathrm{mL}\) \(0.1(\mathrm{N})\) solution of NaOH. The pH of the resulting solution is \(\left(p K_{a}\right.\) of acetic acid is \(\left.4.74\right)\)WBJEE 2012 Hard
- Which of the following is least thermally stable?WBJEE 2018 Easy
More PYQs from WBJEE
- If \(\mathrm{B}\) and \(\mathrm{B}^{\prime}\) are the ends of minor axis and \(\mathrm{S}\) and \(\mathrm{S}^{\prime}\) are the foci of the ellipse \(\frac{x^{2}}{25}+\frac{y^{2}}{9}=1\), then the area of the rhombus
\(\mathrm{SBS}^{\prime} \mathrm{B}^{\prime}\) will beWBJEE 2020 Medium - A spring of force constant \(k\) is cut into three equal parts. The force constant of each part would beWBJEE 2010 Medium
- The value of \(\int_0^\pi \sin ^{50} x \cos ^{49} x d x\) isWBJEE 2011 Easy
- Let \(S_{k}\) be the sum of an infinite GP series whose first term is \(k\) and common ratio is \(\frac{k}{k+1}(k>0)\) Then, the value of \(\sum_{k=1}^{\infty} \frac{(-1)^{k}}{S_{k}}\) is equal toWBJEE 2012 Medium
- If \(x^2+y^2=1\) thenWBJEE 2009 Easy
- Number of common tangents of \(y=x^{2}\) and \(y=-x^{2}+4 x-4\) isWBJEE 2018 Medium