Question:
Identify the product ' B ' in the following series of reactions.
Chlorobenzene $\xrightarrow{\text{i) NaOH, 623 K / 150 atm}{\text{ii) H}_3\text{O}^+} \text{A} \xrightarrow{\text{Br}_2\text{ water}} \text{B}$}
Identify the product ' B ' in the following series of reactions.
Chlorobenzene $\xrightarrow{\text{i) NaOH, 623 K / 150 atm}{\text{ii) H}_3\text{O}^+} \text{A} \xrightarrow{\text{Br}_2\text{ water}} \text{B}$}
Chlorobenzene $\xrightarrow{\text{i) NaOH, 623 K / 150 atm}{\text{ii) H}_3\text{O}^+} \text{A} \xrightarrow{\text{Br}_2\text{ water}} \text{B}$}
Show Hint
Bromine in $CS_2$ gives mono-substitution (ortho/para), but Bromine in water gives poly-substitution (2,4,6) for Phenol.
Updated On: May 14, 2026
- Phenol
- o-Bromophenol
- p-Bromophenol
- 2,4,6-tribromophenol
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Concept Chlorobenzene undergoes nucleophilic substitution (Dow's Process) to form phenol, which then undergoes electrophilic aromatic substitution.
Step 2: Meaning Reaction (i) converts chlorobenzene to sodium phenoxide, followed by acidification to give Phenol (A).
Step 3: Analysis Phenol reacts with bromine water. The $-OH$ group is highly activating and ortho/para directing. In aqueous medium, bromine is highly reactive and substitutes all available ortho and para positions.
Step 4: Conclusion The reaction of phenol with $Br_2$ water yields a white precipitate of 2,4,6-tribromophenol. Final Answer: (D)
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Collision Theory of Chemical Reactions Questions
- For a first-order reaction, the time required to reduce the concentration of the reactant to half its initial value is:
- Find the rate law for the reaction, $\mathrm{CHCl_3(g) + Cl_2(g) \rightarrow CCl_4(g) + HCl(g)}$ if the order of reaction with respect to $\mathrm{CHCl_3}$ is one and $\frac{1}{2}$ with respect to $\mathrm{Cl_2}$.
- The rate for the reaction $2A + B \rightarrow \text{product}$ is $6 \times 10^{-4}\,\mathrm{mol\,dm^{-3}\,s^{-1}}$. Calculate the rate constant if the reaction is first order in $A$ and zeroth order in $B$. Given $[A] = [B] = 0.3\,\text{M}$
- Calculate the rate constant of the first order reaction if 80% of the reactant decomposes in 60 minutes.
- What is the value of rate constant for first order reaction if slope for the graph of rate versus concentration is $2.5 \times 10^{-3}$?
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions