Organic Chemistry Questions

Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

In the reaction with $\text{HCl}$, an alkene reacts in accordance with the Markovnikov’s rule, to give a product $1$ -chloro-$1$ -methylcyclohexane. The possible starting alkene is:

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional groups?

Nucleophilic addition reaction will be most favoured in :

Consider the following reaction:

The product $Z$ is:

Which of the following statements is not correct for a nucleophile?

Two possible stereo-structures of ${\text{CH}}_3\text{CHOH}\cdot \text{COOH}$, which are optically active, are called:

Nitrobenzene can be prepared from benzene by using a mixture of conc. ${\text{HNO}}_3$ and conc. ${\text{H}}_2{\text{SO}}_4$. In this mixture, nitric acid acts as a/an:

The benzoylation of aniline in the presence of $\text{NaOH}$ to form Benzanilide is known by the name:

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

Products of the following reaction :

The major product obtained on treatment of ${\text{CH}}_3{\text{CH}}_2{\text{CH(F)CH}}_3$ with ${\text{CH}}_3{\text{O}}^{-}/{\text{CH}}_3\text{OH}$ is:

Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields :

Trichloroacetaldehyde, ${\text{CCl}}_3\text{CHO}$ reacts with chlorobenzene in presence of sulphuric acid and produces:

Which one of the following esters gets hydrolyzed most easily under alkaline conditions?

In an $S_{N}1$ reaction on chiral centres, there is:

Aniline in a set of the following reactions yielded a coloured product Y: The structure of Y would be:

The oxidation of benzene by ${\text{V}}_2{\text{O}}_5$ in the presence of air at high temperature produces:

Which of the following is not the product of dehydration of $1$ -methylcyclohexanol?

Which of the following is not chiral?

The reaction of toluene with ${\text{Cl}}_2$ in presence of ${\text{FeCl}}_3$ gives $X$ and reaction in presence of light gives $Y$. Thus, $X$ and $Y$ are:

Method by which Aniline cannot be prepared is:

Which of the following reaction(s) can be used for the preparation of alkyl halides?(i) ${\text{CH}}_3{\text{CH}}_2\text{OH}+\text{HCl}\stackrel{{\text{Anhyd. ZnCl}}_2}{\to }$ (ii) ${\text{CH}}_3{\text{CH}}_2\text{OH}+\text{HCl}⟶$ (iii) $({\text{CH}}_3{)}_3\text{COH}+\text{HCl}⟶$ (iv) $({\text{CH}}_3{)}_2\text{CHOH}+\text{HCl}\stackrel{{\text{Anhyd. ZnCl}}_2}{\to }$

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by:

The correct statement regarding the basicity of aryl amines is:

For the following reactions:

Which of the following statements is correct?

Among the following the most stable compound is:

Ethylene oxide when treated with Grignard reagent yields :

In a set of reactions, ethyl benzene yielded a product D: would be:

The reaction between to form an ether can be classified as:

The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is:

Which one is most reactive towards $S_{N}1$ reaction?

The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha carbon, is:

The pair of electron in the given carbanion, ${\text{CH}}_3\text{C}\equiv {\text{C}}^{\ominus }$ is present in which of the following orbitals?

Which of the following is more basic than aniline?

Which one is most reactive towards electrophilic reagent?

Which of the following reagents would distinguish cis-cyclopenta-1, 2-diol from the trans-isomer?

In the reaction:

are:

Which one of the following compounds has the most acidic nature?

Consider the nitration of benzene using mixed concentrated ${\text{H}}_2{\text{SO}}_4$ and ${\text{HNO}}_3$. If a large amount of ${\text{KHSO}}_4$ is added to the mixture, the rate of nitration will be:

3-Phenylpropene on reaction with $\text{HBr}$ gives (as a major product):

The correct order regarding the electronegativity of hybrid orbitals of carbon is:

Given are cyclohexanol (I), acetic acid (II), 2, 4, 6-trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be:

Which of the following biphenyls is optically active?

A given nitrogen-containing aromatic compound $\text{A}$ reacts with $\text{Sn/HCl}$, followed by ${\text{HNO}}_2$ to give an unstable compound $\text{B}$. $\text{B}$, on treatment with phenol, forms a beautiful coloured compound $\text{C}$ with the molecular formula ${\text{C}}_{12}{\text{H}}_{10}{\text{N}}_2\text{O}$. The structure of compound $\text{A}$ is:

Which of the following statements about primary amines is ‘False’?

Consider the reaction:
$${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{Br}+\text{NaCN}\to {\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{CN}+\text{NaBr}$$
This reaction will be the fastest in:

The correct structure of the product $\text{A}$ formed in the reaction:$\underset{\text{Pd/carbon, ethanol}}{\overset{{\text{H}}_2\text{ (gas, 1 atmosphere)}}{\to }}\text{A}$ is:

The IUPAC name of is :

Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine?

Which among the given molecules can exhibit tautomerism?

The correct order of strengths of the carboxylic acids:

Which of the following reactions will not result in the formation of carbon-carbon bonds?

The compound that will react most readily with gaseous bromine has the formula:

${\text{CH}}_3{\text{CO}}_2{\text{C}}_2{\text{H}}_5$ on reaction with sodium ethoxide in ethanol gives $A$, which on heating in the presence of acid gives $B$. Compound $B$ is:

Which of the following can be used as the halide component for Friedel – Crafts reaction?

In the following, the most stable conformation of n-butane is:

In which of the following molecules, all atoms are coplanar?

In pyrrole, the electron density is maximum on:

The correct order of increasing reactivity of $\text{C-X}$ bond towards nucleophile in the following compound is:

Which of the following compounds shall not produce propene by reaction with $\text{HBr}$ followed by elimination or direct only elimination reaction?

Which one of the following nitro-compounds does not react with nitrous acid?

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is:

In the given reaction: . The product $\text{P}$ is:

Aniline in a set of reactions yielded a product D.
The structure of the product D would be :

Among the following which one does not act as an intermediate in Hofmann rearrangement?

What is the $\text{IUPAC}$ name of trans-2-chloro-3-iodo-2-pentene?

Which compound undergoes nucleophilic substitution reaction most easily?

Organic compound $A+{\text{NH}}_3\to B\stackrel{\Delta }{\to }C\stackrel{{\text{Br}}_2/\text{KOH}}{\to }\text{ethylamine}$. Compound $A$ is:

Which of the following compounds is most basic?

Pyridine is less basic than triethylamine because:

Match the compounds with their reactions/products:$(a)$ Benzaldehyde $(i)$ Phenolphthalein$(b)$ Phthalic anhydride $(ii)$ Benzoin condensation$(c)$ Phenyl benzoate $(iii)$ Oil of wintergreen$(d)$ Methyl salicylate $(iv)$ Fries rearrangement

What is the order of reactivity of $\text{PhMgBr}$ with the following:

In a set of reactions, acetic acid yielded a product D.
The structure of D would be :

Correct configuration of the following is:

The mechanisms of reactions $(i)$ and $(ii)$ are:$(i)$ Isobutyl bromide $+{\text{C}}_2{\text{H}}_5\text{OH}\to$ Ether$(ii)$ Isobutyl bromide $+{\text{C}}_2{\text{H}}_5{\text{O}}^{-}\to$ Ether

${\text{C}}_6{\text{H}}_5{\text{CONHCH}}_3$ can be converted into ${\text{C}}_6{\text{H}}_5{\text{CH}}_2{\text{NHCH}}_3$ by:

In the hydrocarbon ${\text{CH}}_3-\text{CH}=\text{CH}-{\text{CH}}_2-\text{C}\equiv \text{CH}$, the state of hybridization of carbons 1, 3 and 5 are:

A strong base can abstract an $\alpha$ -hydrogen from:

The major organic product formed from the following reaction :

Assertion : Rate of hydrolysis of methyl chloride to methanol is higher in $\text{DMF}$ than in water.Reason : Hydrolysis of methyl chloride follows second order kinetics.

How many stereoisomers does the molecule ${\text{CH}}_3\text{CH}={\text{CHCH}}_2{\text{CHBrCH}}_3$ have?

Consider the reaction:
$$\text{RCHO}+{\text{NH}}_2{\text{NH}}_2\to \text{RCH}=\text{N}-{\text{NH}}_2+{\text{H}}_2\text{O}$$
What sort of reaction is it?

An organic compound (${\text{C}}_3{\text{H}}_9\text{N}$) ($A$), when treated with nitrous acid, gave an alcohol and ${\text{N}}_2$ gas was evolved. ($A$) on warming with ${\text{CHCl}}_3$ and caustic potash gave ($C$) which on reduction gave isopropylmethylamine. Predict the structure ($A$).

The stability of carbanions in the following (alkynyl, alkenyl, alkyl) is in the order of:

Consider the following reaction:
The product 'A' is:

Which of the following reagents will be able to distinguish between $1$ -butyne and $2$ -butyne?

Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.Reason : $\text{C}-\text{H}$ bond is stronger than $\text{C}-\text{D}$ bond.

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of:

Which of the following compounds will give a yellow precipitate with iodine and alkali?

${\text{CH}}_3\text{CHO}$ and ${\text{C}}_6{\text{H}}_5{\text{CH}}_2\text{CHO}$ can be distinguished chemically by:

Base strength of carbanions is in the order of:

Which one of the following is NOT a condensation polymer?

In the following reaction:

The major product $A$ is:

Assertion : $t$ -Butyl methyl ether is not prepared by the reaction of $t$ -butyl bromide with sodium methoxide.Reason : Sodium methoxide is a strong nucleophile.

The major product of the reaction between an alkene and $\text{HBr}$ in the presence of peroxides is governed by:

Deficiency of vitamin ${\text{B}}_1$ causes the disease:

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is:

Which one the following is most reactive towards electrophilic attack?

Which one of the following sets of monosaccharides forms sucrose?