WBJEE · Chemistry · General Organic Chemistry
The correct stability order of the following carbocations is
\(\underset{\text{I}}{\mathrm{H}_2 \stackrel{\oplus}{\mathrm{C}}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3}\)
\(\underset{\text{II}}{\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_2-\mathrm{CH}=\mathrm{CH}-\mathrm{BMe}_2}\)
\(\underset{\text{III}}{\mathrm{H}_2 \stackrel{\oplus}{\mathrm{C}}-\mathrm{CH}=\mathrm{CH}-\mathrm{NMe}_2}\)
\(\underset{\text{Iv}}{\mathrm{H}_2 \stackrel{\oplus}{\mathrm{C}}-\mathrm{CH}=\mathrm{CH}-\mathrm{OMe}}\)
- A II \( > \) I \( > \) III \( > \) IV
- B III \( > \) I \( > \) II \( > \) IV
- C III \( > \) IV \( > \) I \( > \) II
- D IV \( > \) III \( > \) II \( > \) I
Answer & Solution
Correct Answer
(C) III \( > \) IV \( > \) I \( > \) II
Step-by-step Solution
Detailed explanation
Hint: \(\quad\) III \( > \) IV \( > | > | \mid\) \(\left.+\mathrm{R} \text { effect : }-\ddot{\mathrm{N}}\mathrm{Me}_2\right\rangle-\underset{\cdot\cdot}{\ddot{\mathrm{O}}} \mathrm{CH}_3\) \(-\mathrm{BMe}_2\) can show \(-\mathrm{R}\) effect
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
- When aniline is nitrated with nitrating mixture in ice cold condition, the major product obtained isWBJEE 2013 Medium
- The quantity \(h v / K_{\mathrm{B}}\) corresponds toWBJEE 2019 Medium
- The weight of oxalic acid that will be required to prepare a \(1000 \mathrm{mL}(\mathrm{N} / 20)\) solution isWBJEE 2012 Easy
- Which of the following orbitals will have zero probability of finding the electron in the yz plane ?WBJEE 2010 Easy
- On passing 'C ampere of current for time 't' sec through 1 L of 2 (M) \(\mathrm{CuSO}_{4}\) solution (atomic weight of \(\mathrm{Cu}=63.5\) ), the amount \({ }^{\prime} \mathrm{m}^{\prime}\) of Cu (in gram) deposited on cathode will beWBJEE 2012 Medium
- A solution containing \(4 \mathrm{~g}\) of polymer in 4.0 litre solution at \(27^{\circ} \mathrm{C}\) shows an osmotic pressure of \(3.0 \times 10^{-4} \mathrm{~atm}\). The molar mass of the polymer in \(\mathrm{g} / \mathrm{mol}\) isWBJEE 2023 Hard
More PYQs from WBJEE
- If in case of a radio isotope the value of half-life \(\left(T_{1/2}\right)\) and decay constant \((\lambda)\) are identical in magnitude, then their value should beWBJEE 2023 Medium
- The speed distribution for a sample of \(N\) gas particles is shown below. \(P(v)=0\) for \(v\gt2 v_0\). How many particles have speeds between \(1.2 \mathrm{v}_0\) and \(1.8 \mathrm{v}_0\) ?
WBJEE 2024 Easy - A particle of charge ' \(q\) ' and mass ' \(m\) ' moves in a circular orbit of radius ' \(r\) ' with angular speed ' \(\omega\) '. The ratio of the magnitude of its magnetic moment to that of its angular momentum depends onWBJEE 2025 Medium
- Let \(f\) be a function which is differentiable for all real \(x\). If \(f(2)=-4\) and \(f^{\prime}(x) \geq 6\) for all \(x \in[2,4]\)WBJEE 2025 Medium
- The side \(A B\) of \(\triangle A B C\) is fixed and is of length \(2 a\) unit. The vertex moves in the plane such that the vertical angle is always constant and is \(\alpha\). Let \(x\)-axis be along \(A B\) and the origin be at \(A\). Then the locus of the vertex isWBJEE 2022 Hard
- In the Lassaigne's test for the detection of nitrogen in an onganic compound. the appearance of blue coloured compound is due toWBJEE 2015 Easy