EASY

Earn 100

Explain the litmus paper test with phenols and alcohols.

Important Questions on Alcohols, Phenols and Ethers

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

An organic compound with molecular formula

C_{7} H_{8} O

dissolves in

NaOH

and gives a characteristic colour with

{FeCl}_{3}

. On treatment with bromine, it gives a tribromo derivative

C_{7} H_{5} {OBr}_{3}

. The compound is

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

When Phenol is heated with phthalic anhydride in concentrated sulphuric acid and the hot reaction mixture is poured into a dilute solution of sodium hydroxide, the product formed is

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

A diazonium chloride reacts with $Ph - OH$ to give an azodye. The reaction is called

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Two aromatic compounds having formula $C_{7} H_{8} O$ which are easily identifiable by $F e C I_{3}$ solution test (violet colouration) are

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Which two of the following statements are correct for Phenol?

(i) Phenol is more acidic than alcohol

(ii) Phenol is used in production of melamine plastic

(iii) Phenol gives violet colour with neutral Ferric chloride solution

(iv) Phenol when heated with acetyl chloride gives Phenetole

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Phenol can be distinguished from ethanol by the following reagents except

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Phenol

\overset{N a N O_{2} / H_{2} S O_{4}}{\to} B \overset{H_{2} O}{\to} C \overset{N a O H}{\to} D

Name of the above reaction is

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Which substance will not react with

ϕ N N C l

(

ϕ =

Phenyl) to give dye?

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

2-methoxy butane is obtained by reacting diazomethane with

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Represent the union of two sets by Venn diagram for each of the following.

$X = {x | x$ is a prime number between $80$ and $100}$

$Y = {y | y$ is an odd number between $90$ and $100}$

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Which of the test is used for detection of secondary amines ?

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

To distinguish between salicylic acid and phenol one can use

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Phenol gives characteristic colouration with

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Phenol on heating with phthalic acid in presence of conc. H₂SO₄ forms a colourless compound which turns to pink on making it alkaline. This test is called

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Distinction between Alcohols and Phenols

Phenolphthalein is formed by condensation of phthalic anhydride and