Organic Chemistry Questions

The correct structure of 2,6-Dimethyl-dec-4-ene is:

Dihedral angle of least stable conformer of ethane is:

Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?

The major product of the following chemical reaction is:

Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.

The intermediate compound "X" in the following chemical reaction is:

Which of the following compounds is not chiral?

Acetyl bromide reacts with an excess of ${\text{CH}}_3\text{MgI}$ followed by treatment with a saturated solution of ${\text{NH}}_4\text{Cl}$ to give:

Match List - I with List - II:

Which structure corresponds to the IUPAC name 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid?

The reagent 'R' in the given sequence of chemical reaction is:

The rate of the reaction is fastest when $Z$ is:

Statement I: The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.Statement II: $o$ -nitrophenol, $m$ -nitrophenol and $p$ -nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.

Among the following compounds, which can be dehydrated very easily?

$$\text{RMgX}+{\text{CO}}_2\stackrel{\text{dry ether}}{\to }Y\stackrel{{\text{H}}_3{\text{O}}^{+}}{\to }\text{RCOOH}$$
What is $Y$ in the above reaction?

Which of the following will have a meso-isomer also?

The IUPAC name of the compound shown below is:

Which compound amongst the following is not an aromatic compound?
(1)

A reagent that can distinguish cis-cyclopenta-1,2-diol from the trans-isomer is:

Statement I: The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions.Statement II: The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding.

The total number of pi-bond electrons in the structure of anthracene (${\text{C}}_{14}{\text{H}}_{10}$) is:

For which of the following parameters would the structural isomers ${\text{C}}_2{\text{H}}_5\text{OH}$ and ${\text{CH}}_3{\text{OCH}}_3$ be expected to have the same values? (Assume ideal behavior)

The incorrect statement regarding chirality is:

The correct sequence of bond enthalpy of '$\text{C-X}$ ' bond is:

The major product formed in dehydrohalogenation reaction of 2-Bromopentane is pent-2-ene. This product formation is based on?

The correct IUPAC name of the following compound is:

Consider the acidity of the following carboxylic acids:
(1) $\text{PhCOOH}$
(2) $\text{o}–{\text{NO}}_2{\text{C}}_6{\text{H}}_4\text{COOH}$
(3) $\text{p}–{\text{NO}}_2{\text{C}}_6{\text{H}}_4\text{COOH}$
(4) $\text{m}–{\text{NO}}_2{\text{C}}_6{\text{H}}_4\text{COOH}$
Which one is the most acidic?

Compound $X$ on reaction with ${\text{O}}_3$ followed by ${\text{Zn/H}}_2\text{O}$ gives formaldehyde and 2-methyl propanal as products. The compound $X$ is:

Statement I: In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. $\text{HCl}+{\text{ZnCl}}_2$, known as Lucas Reagent.Statement II: Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.

The correct order of decreasing basic strength of the given amines is:

Which one of the following compounds can exist as cis-trans isomers?

Predict the major product of the following reaction:

Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula ${\text{C}}_4{\text{H}}_8\text{O}$ is :

Predict the major product 'P' in the following sequence of reactions:

Which one of the following reactions does NOT give benzene as the product?

Which one of the following pairs represents stereoisomerism ?

Which one of the following compounds is most acidic ?

Which one of the following alkenes will react faster with H2 under catalytic hydrogenation conditions ?
(R = Alkyl substituent)

What is the product obtained in the following reaction: $\text{Nitrobenzene}\stackrel{{\text{Zn/NH}}_4\text{Cl}}{\to }\dots$?

In a set of reactions $m$ -bromobenzoic acid gave a product $D$. Identify the product $D$.

In Dumas' method of estimation of nitrogen $0.35\text{g}$ of an organic compound gave $55\text{mL}$ of nitrogen collected at $300\text{K}$ temperature and $715\text{mm}$ pressure. The percentage composition of nitrogen in the compound would be: (Aqueous tension at $300\text{K}=15\text{mm}$)

Which one of the following is most reactive towards electrophilic reagent?

Which one is a nucleophilic substitution reaction among the following?

Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear?

In the following reactions, the major products $A$ and $C$ are respectively:$\text{2-methylbutan-2-ol}\stackrel{{\text{H}}^{+}/\Delta }{\to }A\text{ (Major)}\stackrel{\text{HBr/Dark}}{\to }C\text{ (Major)}$

The Lassaigne's extract is boiled with conc. ${\text{HNO}}_3$ while testing for halogens. By doing so it:

The correct IUPAC name of the compound

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

Which of the following compounds will undergo racemisation when a solution of $\text{KOH}$ hydrolyses them?

Propionic acid with ${\text{Br}}_2/\text{P}$ yields a dibromo product. Its structure would be:

Among the following sets of reactants, which one produces anisole?

Which of the following will not be soluble in sodium hydrogen carbonate (${\text{NaHCO}}_3$)?

A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of $\alpha$ -hydroxy acid. The carbonyl compound is :

Predict the product

Which one is most reactive towards Nucleophilic addition reaction?

Identify Z in the sequence of reactions:$\text{But-1-ene}\stackrel{HBr/H_2{O}_2}{\to }Y\stackrel{C_2{H}_{5}ONa}{\to }Z$

${\text{H}}_2\text{COH}\cdot {\text{CH}}_2\text{OH}$ (ethylene glycol) on heating with periodic acid gives:

Which of the following organic compounds has the same hybridization as its combustion product (${\text{CO}}_2$)?

$2,3$ -Dimethyl-$2$ -butene can be prepared by heating which of the following compounds with a strong acid?

The major product formed in the following reaction is:

The major organic product in the reaction,${\text{CH}}_3-\text{O}-\text{CH}({\text{CH}}_3{)}_2+\text{HI}\to \text{Product}$ is :

The IUPAC name of the compound having the formula $\text{CH}\equiv \text{C}-\text{CH}={\text{CH}}_2$ is:

The number of structural isomers possible from the molecular formula ${\text{C}}_3{\text{H}}_9\text{N}$ is:

Caprolactum is used for the manufacture of:

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?