JEE Mains · Chemistry · STD 11 - 8.4. Organic chemistry reaction mechanism
The correct order of stability of following carbocations is :
- A \(\mathrm{C}\gt\mathrm{B}\gt\mathrm{A}\gt\mathrm{D}\)
- B \(\mathrm{A}\gt\mathrm{B}\gt\mathrm{C}\gt\mathrm{D}\)
- C \(\mathrm{B}\gt\mathrm{C}\gt\mathrm{A}\gt\mathrm{D}\)
- D \(\mathrm{C}\gt\mathrm{A}\gt\mathrm{B}\gt\mathrm{D}\)
Answer & Solution
Correct Answer
(D) \(\mathrm{C}\gt\mathrm{A}\gt\mathrm{B}\gt\mathrm{D}\)
Step-by-step Solution
Detailed explanation
Solution :- C is aromatic due to \(\oplus \mathrm{ve}\) charge hence it is most stable A have more resonance structure B have less resonance structure D have only hyper conjugation Consider First Aromaticity \(>\) Resonance \(>\) Hyper conjugation Ans. D \( < \) B \( < \) A…
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
- A solution containing \(2\,g\) of a non-volatile solute in \(20\,g\) of water boils at \(373.52\,K\). The molecular mass of the solute is \(.......g\,mol ^{-1}\). (Nearest integer) Given, water boils at \(373\,K,K _{ b }\) for water \(=0.52\,K\,kg\,mol ^{-1}\)JEE Mains 2023 Medium
- The number of valence electrons present in the metal among \(\mathrm{Cr}, \mathrm{Co}, \mathrm{Fe}\) and Ni which has the lowest enthalpy of atomisation is _______.JEE Mains 2025 Easy
- The compounds which give positive Fehling's test are :
(A)
(B)
(C) \(\mathrm{HOCH}_2-\mathrm{CO}-(\mathrm{CHOH})_3-\mathrm{CH}_2-\mathrm{OH}\)
(D)
(E)
Choose the correct answer from the options given below :JEE Mains 2025 Medium - The characteristics of elements \(X, Y\) and \(Z\) with atomic numbers, respectively, \(33,53\) and \(83\) are :JEE Mains 2021 Medium
- Correct statements from the following are
A. Potassium dichromate is an oxidising agent and it oxidises \(FeSO_4\) to \(Fe_2(SO_4)_3\) in acidic medium.
B. Sodium dichromate can be used as primary standard in volumetric estimation.
C. \(CrO_4^{2-}\) and \(Cr_2O_7^{2-}\) are interconvertible in aqueous solution by varying the \(pH\) of the solution.
D. \(Cr\)-\(O\)-\(Cr\) bond angle in \(Cr_2O_7^{2-}\) is \(126^\circ\).
Choose the correct answer from the options given below:JEE Mains 2026 Hard - The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is:JEE Mains 2026 Medium
More PYQs from JEE Mains
- A small square loop of side \('a'\) and one turn is placed inside a larger square loop of side \({b}\) and one turn \((b \gg a)\). The two loops are coplanar with thei centres coinciding. If a current \(I\) is passed in the square loop of side \('b',\) then the coefficient of mutual inductance between the two loops isJEE Mains 2021 Hard
- A smooth inclined plane ends in a vertical circular loop, as shown in the figure. A small body is released from height \(h\) as shown. If the body exerts a force of three times its weight on the plane at the highest point of circle then the height \(h = \alpha R\). The value of \(\alpha\) is _______.
JEE Mains 2026 Medium - If the area of the region bounded by the curves \(y^2-2 y=-x, x+y=0\) is \(A\), then \(8 A\) is equal toJEE Mains 2023 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
- Let a circle \(C\) pass through the points \((4,2)\) and \((0,2)\), and its centre lie on \(3 x+2 y+2=0\). Then the length of the chord, of the circle \(C\), whose mid-point is \((1,2)\), is :JEE Mains 2025 Medium
- Consider two radiations of wavelengths
1. \(\lambda_1 = 2000\) Å
2. \(\lambda_2 = 6000\) Å
The ratio of the energies of these two radiations \(\left(\dfrac{E_1}{E_2}\right)\) is ________ (Nearest integer).JEE Mains 2026 Easy