COMEDK · Chemistry · 26. Alcohols Phenols and Ethers
The unstable intermediate dichlorocarbene \(\left[: \mathrm{CCl}_{2}\right]\) is formed during
- A Kolbe's reaction
- B Friedel-Crafts reaction
- C Williamson synthesis
- D Reimer-Tiemann reaction
Answer & Solution
Correct Answer
(D) Reimer-Tiemann reaction
Step-by-step Solution
Detailed explanation
The unstable intermediate \(\left[: \mathrm{CCl}_{2}\right]\) is formed in Reimer-Tiemann reaction which is an electrophilic substitution reaction and occurs through the following steps. (i) Generation of electrophile (ii) Electrophilic substitution
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
- Arrange the following compounds in the increasing order of their reactivity when each of them is reacted with chloroethane / anhydrous AlCl\(_3\).
COMEDK 2024 Medium - \(\mathrm{N}_{2}\) does not show property of catenation becauseCOMEDK 2015 Easy
- In nucleic acids the nucleotides are linked byCOMEDK 2014 Easy
- For the reaction \(\mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{NO}_{(\mathrm{g})} \rightarrow 2 \mathrm{NOCl}_{(\mathrm{g})}\), the following data was obtained:
Experiment No. Initial concentration of \(Cl_2\) (M) Initial concentration of NO (M) Initial reaction rate (M/min) I 0.15 0.15 0.60 II 0.30 0.15 1.20 III 0.15 0.30 2.40 IV 0.25 0.25 2.78
Identify the order of the reaction with respect to \(\mathrm{Cl}_2, \mathrm{NO}\) and the value of Rate constant.COMEDK 2024 Medium - Nylon is not aCOMEDK 2016 Easy
- Thomas slag isCOMEDK 2013 Easy
More PYQs from COMEDK
- For a paramagnetic material, the dependence of the magnetic susceptibility \(\chi\) on the absolute temperature is given asCOMEDK 2024 Easy
- The mass of precipitate formed when 50 mL of 16.9% aqueous solution of \(\text{AgNO}_3\) is mixed with 50 mL of 5.8% NaCl solution is------------g
[Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5]COMEDK 2026 Medium - Two point charges \(Q_{1}=2 \mu \mathrm{C}\) and \(Q_{2}=1 \mu \mathrm{C}\) are placed as shown. The coordinates of the point \(P\) are \((2 \mathrm{~cm}, 1 \mathrm{~cm})\). The electric intensity vector at \(P\) subtends an angle \(\theta\) with the positive \(X\)-axis. The value of \(\theta\) is given by
COMEDK 2012 Hard - The equation of the circle which touches the \(x\)-axis, passes through the point \((1,1)\) and whose centre lies on the line \(x+y=3\) in the first quadrant isCOMEDK 2024 Medium
- Given below are 4 reactions. Two of these reactions will give product which is an equimolar mixture of the d and 1 forms. Identify these 2 reactions.
[A] 2- Methylpropene + \(\mathrm{HI} \rightarrow\) ---------
[B] But-1-ene + \(\mathrm{HBr} \rightarrow\) -----------
[C] 3-Methylbut-1-ene + \(\mathrm{HI} \rightarrow\) -----------
[D] 3- Phenylpropene + \(\mathrm{HBr}\) (Peroxide) \(\rightarrow\) -----------COMEDK 2024 Medium - The \(\mathrm{E}^{\circ}\) values of \(\mathrm{A} . \mathrm{B}\) and \(\mathrm{C}\) are given. Which element/(s) is/(are) good for coating the surface of iron to prevent corrosion?
Given: \([\mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^0=-0.44 \mathrm{~V} ; \quad \mathrm{E}_{\mathrm{A}^{2+} / \mathrm{A}}^0=-2.37 \mathrm{~V} ; \quad \mathrm{E}_{\mathrm{B}^{2+} / \mathrm{B}}^0=-0.15 \mathrm{~V} ; \quad \mathrm{E}_{\mathrm{C}^{2+} / \mathrm{C}}^0=+0.34 \mathrm{~V}]\)COMEDK 2024 Medium