JEE Mains · Chemistry · STD 11 - 8.4. Organic chemistry reaction mechanism
The increasing order of the \(pK_b\) of the following compound is

- A \((c) < (a) < (d) < (b)\)
- B \((b) < (d) < (a) < (c)\)
- C \((a) < (c) < (d) < (b)\)
- D \((b) < (d) < (c) < (a)\)
Answer & Solution
Correct Answer
(C) \((a) < (c) < (d) < (b)\)
Step-by-step Solution
Detailed explanation
\(CH_3O-, CH_3-, H\) is electron donating, But \(-NO_2\) is electron withdrawing group.
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
- For any given series of spectral lines of atomic hydrogen, let \(\Delta \bar V\, = \,\Delta {\bar V_{\max }}\, - \,\Delta {\bar V_{\min }}\) be the difference in maximum and minimum frequencies in \(cm^{-1}.\) the ration \(\Delta {\bar V_{Lymann}}/\,\Delta {\bar V_{Balmer}}\) isJEE Mains 2019 Medium
- The transition element that has lowest enthalpy of atomisation isJEE Mains 2019 Easy
- One Faraday of electricity liberates \(\mathrm{x} \times 10^{-1}\) gram atom of copper from copper sulphate, \(\mathrm{x}\) is _______.JEE Mains 2024 Hard
- Among the statements \((I - IV),\) the correct ones are: \((I)\) \(Be\) has smaller atomic radius compared to \(Mg\) \((II)\) \(Be\) has higher ionization enthalpy than \(Al.\) \((III)\) Charge/radius ratio of \(Be\) is greater than that of \(Al\). \((IV)\) Both Be and \(Al\) form mainly covalent compounds.JEE Mains 2020 Hard
- For the first order reaction \(A \rightarrow 2 B, 1\) \(mole\) of reactant \(A\) gives \(0.2\) moles of \(B\) after \(100\, minutes.\) The half life of the reaction is \(.....\,min\) [Use \(: \ln 2=0.69, \ln 10=2.3\) Properties of logar \(\ln \left(\frac{\mathrm{x}}{\mathrm{y}}\right)=\ln \mathrm{x}-\ln \mathrm{y}\)JEE Mains 2021 Hard
- The rate of a reaction doubles when its temperature changes from \(300\, K\) to \(310\, K.\) Activation energy of such a reaction will be .......... \(kJ\, mol^{-1}\). \((R= 8.314\,JK^{-1} \,mol^{-1}\) and \(\log 2=0.301)\)JEE Mains 2013 Hard
More PYQs from JEE Mains
- A tightly wound long solenoid carries a current of 1.5 A . An electron is executing uniform circular motion inside the solenoid with a time period of 75 ns . The number of turns per metre in the solenoid is ________.
[Take mass of electron \(\mathrm{m}_{\mathrm{e}}=9 \times 10^{-31} \mathrm{~kg}\), charge of electron \(\left|\mathrm{q}_{\mathrm{e}}\right|=1.6 \times 10^{-19} \mathrm{C}\),
\(\left.\mu_0=4 \pi \times 10^{-7} \frac{\mathrm{~N}}{\mathrm{~A}^2}, 1 \mathrm{~ns}=10^{-9} \mathrm{~s}\right]\)JEE Mains 2025 Easy - Two electrons are moving with non-relativistic speeds perpendicular to each other. If corresponding de Broglie wavelengths are \({\lambda _1}\) and \({\lambda _2}\), their de Broglie wavelength in the frame of reference attached to their centre of mass isJEE Mains 2018 Hard
- A solutivn is prepared by mixing \(8.5\,g\) of \(CH_2Cl_2\) and \(11.95\,g\) of \(CHCl_3\) . If vapour pressure of \(CH_2Cl_2\) and \(CHCl_3\) at \(298\,K\) are \(415\) and \(200\, mm\,Hg\) respectively, the mole fraction of \(CHCl_3\) in vapour form is : (Molar mass of \(Cl\, = 35.5\, g\, mol^{-1}\) )JEE Mains 2017 Hard
- Two projectiles are thrown with same initial velocity making an angle of \(45^{\circ}\) and \(30^{\circ}\) with the horizontal respectively. The ratio of their respective ranges will be.JEE Mains 2022 Easy
- For the function \(f(x) = e^{\sin|x|} - |x|\), \(x \in \mathbb{R}\), consider the following statements:
Statement I: \(f\) is differentiable for all \(x \in \mathbb{R}\).
Statement II: \(f\) is increasing in \(\left(-\pi, -\dfrac{\pi}{2}\right)\).
In the light of the above statements, choose the correct answer from the options given below:JEE Mains 2026 Medium - Let \(f ( x )\) be a polynomial of degree \(6\) in \(x ,\) in which the coefficient of \(x^{6}\) is unity and it has extrema at \(x=-1\) and \(x=1\). If \(\lim _{x \rightarrow 0} \frac{f(x)}{x^{3}}=1,\) then \(5 \cdot f (2)\) is equal to .............JEE Mains 2021 Hard