Organic Chemistry Questions

Among the following, which hydrolysis reaction occurs at the slowest rate?

The vapor of secondary alcohol passed over heated copper at $573\text{K}$ yield:

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?

Dihedral angle of least stable conformer of ethane is:

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

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

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:

The major product of the following chemical reaction is:

The major products C and D formed in the following reaction respectively are:${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{OC(CH}}_3{)}_3\stackrel{\text{Excess HI, }\Delta }{\to }\text{C}+\text{D}$

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

The compound which shows metamerism is:

Which of the following compounds is not chiral?

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

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

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

The IUPAC name of the compound shown below is:

The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?
(1)

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

Statement I: Primary aliphatic amines react with ${\text{HNO}}_2$ to give unstable diazonium salts.Statement II: Primary aromatic amines react with ${\text{HNO}}_2$ to form diazonium salts which are stable even above $300\text{K}$.

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

The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid 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.

Mark the reaction among the following that does not give benzoic acid as the major product:

The correct IUPAC name of the following compound is:

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

Which one of the following has the minimum boiling point?

Match List - I with List - II:

Amongst the following compounds, the optically active alkane having the lowest molecular mass is:

The product formed in the following chemical reaction is:

Options:

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

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:

What is the IUPAC name of the organic compound formed in the following chemical reaction?
$$\text{Acetone}\underset{(ii){\text{H}}_2{\text{O, H}}^{+}}{\overset{(i){\text{C}}_2{\text{H}}_5\text{MgBr, dry Ether}}{\to }}\text{Product}$$

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

$${\text{CH}}_3{\text{CH}}_2{\text{COO}}^{-}{\text{Na}}^{+}+\text{NaOH}\stackrel{\text{Heat},?}{\to }{\text{CH}}_3{\text{CH}}_3+{\text{Na}}_2{\text{CO}}_3$$
Identify the missing reagent:

The ammonia evolved from the treatment of $0.30\text{g}$ of an organic compound for the estimation of nitrogen was passed in $100\text{mL}$ of $0.1\text{M}$ sulphuric acid. The excess of acid required $20\text{mL}$ of $0.5\text{M}$ sodium hydroxide solution for complete neutralization. The organic compound is:

The product formed from the following reaction sequence is:

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is:

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute $\text{NaOH}$ followed by heating?

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is:

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:

Which one of the following does not have $s{p}^2$ hybridized carbon?

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

Which of the following is the strongest base?

Which of the following sequence of reactions is suitable to synthesize chlorobenzene?

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.

Identify product (A) in the following reaction:

Consider the following reaction:The product Y is:

Options:

Which of the following undergoes a reaction with $50\%$ sodium hydroxide solution to give the corresponding alcohol and acid?

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

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 gas used in artificial ripening of green fruits is

The number of $\pi$ -electrons in the molecules of aromatic compound is

In laboratory, ethylene and acetylene can be distinguished by

The number of π-electrons in the molecules of an aromatic compound satisfies which rule?

Which compound has the highest boiling point?

In the laboratory, ethylene and acetylene can be distinguished by using

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

Predict the major product of the following reaction:

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

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

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

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

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

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

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:

The product formed in aldol condensation is:

The order of decreasing reactivity towards an electrophilic reagent for the following: (i) Benzene, (ii) Toluene, (iii) Chlorobenzene, and (iv) Phenol would be:

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: