Organic Chemistry Questions

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

Which of the following is not chiral?

For the following anions: (i) ${\text{I}}^{-}$, (ii) ${\text{Cl}}^{-}$, (iii) ${\text{Br}}^{-}$. (Question implies adding (iv) ${\text{F}}^{-}$ based on options). The increasing order of nucleophilicity in a polar protic solvent would be:

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. $\text{HCl}$ is called:

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

${\text{CH}}_3{\text{—CHCl—CH}}_2{\text{—CH}}_3$ has a chiral center. Which one of the following represents its $R$ configuration?

If there is no rotation of plane polarized light by a compound in a specific solvent, thought to be chiral, it may mean that:

Which of the following represents the correct order of the acidity in the given compounds?

The IUPAC name of is :

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

Which of the following is more basic than aniline?

Ethylene oxide when treated with Grignard reagent yields :

The product formed in aldol condensation is:

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

Nucleophilic addition reaction will be most favoured in :

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

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 :

The general molecular formula, which represents the homologous series of alkanols is :

In a set of reactions propanoic acid yielded a compound D.${\text{CH}}_3{\text{CH}}_2\text{COOH}\stackrel{{\text{SOCl}}_2}{\to }\text{B}\stackrel{{\text{NH}}_3}{\to }\text{C}\underset{\text{KOH}}{\overset{{\text{Br}}_2}{\to }}\text{D}$ The structure of D would be :

Assertion : Cyclopentadienyl anion is much more stable than allyl anion.Reason : Cyclopentadienyl anion is aromatic in character.

Assertion : Alkyl isocyanides in acidified water give alkyl formamides.Reason : In isocyanides, carbon first acts as a nucleophile and then as an electrophile.

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.

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:

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

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

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

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

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

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

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

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

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

Method by which Aniline cannot be prepared is:

Caprolactum is used for the manufacture of:

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

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

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

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

Which one is most reactive towards Nucleophilic addition reaction?

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

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

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

In the reaction:

are:

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

The correct order of strengths of the carboxylic acids:

Which among the given molecules can exhibit tautomerism?

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:

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:

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 biphenyls is optically active?

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

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:

What products are formed when m-xylene is treated with ${\text{Br}}_2$ in the presence of ${\text{FeBr}}_3$?

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

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?

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

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

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

For the following reactions:

Which of the following statements is correct?

The correct statement regarding the basicity of aryl amines 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) $({\text{CH}}_3{)}_2\text{CHOH}+\text{HCl}\stackrel{{\text{Anhyd. ZnCl}}_2}{\to }$

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 will give a yellow precipitate with iodine and alkali?

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

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

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 ($A$).

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?

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

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

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

Which of the following compounds is most basic?

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

Which compound undergoes nucleophilic substitution reaction most easily?

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

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

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

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

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

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is:

In the Kjeldahl's method for estimation of nitrogen, ammonia evolved from $0.75\text{g}$ of a soil sample neutralized $10\text{mL}$ of $1\text{M}$ ${\text{H}}_2{\text{SO}}_4$. The percentage of nitrogen in the soil is:

Which organic compounds polymerize to form the polyester Dacron?

Which one of the following is an example of a thermosetting polymer?

Which of the following hormones is produced under conditions of stress and stimulates glycogenolysis in the liver?

$D(+)$ glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be:

Which of the following will be the most stable diazonium salt $R{N}_2^{+}{X}^{-}$?

In the following reaction, the product (A) is:

Predict the products in the given reaction:

Among the following compounds the one that is most reactive towards electrophilic nitration 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 nomenclature is NOT according to the IUPAC system?

Which of the following acids does NOT exhibit optical isomerism?

In the following sequence of reactions:
$${\text{CH}}_3\text{Br}\stackrel{\text{KCN}}{\to }\text{A}\stackrel{{\text{H}}_3{\text{O}}^{+}}{\to }\text{B}\stackrel{{\text{LiAlH}}_4/\text{ether}}{\to }\text{C}$$
The end product (C) is:

Which one of the following sets of monosaccharides forms sucrose?

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

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

In the following reaction:

The major product $A$ is:

Which one of the following is NOT a condensation polymer?