A English
Properties of Phenols Questions in English
Class 12 Chemistry · Alcohols, Phenols and Ethers · Properties of Phenols
751+
Questions
English
Language
100%
With Solutions
Showing 1 of 751 questions in English
751
MediumMCQ
The functional group that can be identified through the phthalein dye test is:
A
$(1)$ Carboxylic acid
B
$(2)$ Alcohol
C
$(3)$ Aldehyde
D
$(4)$ Phenolic
Solution
(D) The phthalein dye test is a characteristic chemical test used to identify the presence of phenolic groups.
In this test,a phenol reacts with phthalic anhydride in the presence of concentrated sulphuric acid $(H_2SO_4)$ as a dehydrating agent.
This reaction results in the formation of a phthalein dye (such as phenolphthalein),which exhibits a distinct color change in an alkaline medium.
Therefore,the correct functional group identified by this test is the phenolic group.
In this test,a phenol reacts with phthalic anhydride in the presence of concentrated sulphuric acid $(H_2SO_4)$ as a dehydrating agent.
This reaction results in the formation of a phthalein dye (such as phenolphthalein),which exhibits a distinct color change in an alkaline medium.
Therefore,the correct functional group identified by this test is the phenolic group.
0 likes
View SolutionAlcohols, Phenols and Ethers — Properties of Phenols · Frequently Asked Questions
1Are these Alcohols, Phenols and Ethers questions useful for JEE and NEET?
Yes. All questions in this section are mapped to JEE Main and NEET exam patterns. Previous year questions from JEE Main, NEET, GUJCET and state-level exams are included with full solutions.
2Can I switch to Hindi or Gujarati for these questions?
Yes. Use the language tabs in the hero section or the sidebar to view the same questions and solutions in English, Hindi or Gujarati.
3How do I generate a question paper from this subtopic?
Use the Vedclass Exam Paper Generator — select the chapter and subtopic, set difficulty, and generate Sets A, B, C, D automatically. First 3 chapters of every subject are free.
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D papers from this chapter in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See DemoFor Teachers & Institutes
Generate a Alcohols, Phenols and Ethers Exam Paper in 2 Minutes
Select subtopic & difficulty — Sets A, B, C, D auto-generated with No Repeat logic.
First 3 chapters of every subject are free — no payment required.