List of top Chemistry Questions on Organic Chemistry asked in CBSE CLASS XII

Write any two differences between SN\(_1\) and SN\(_2\) reactions. Which of the following compounds would undergo SN\(_1\) reaction faster and why?
SN1 and SN2 reactions.
Can sodium ethoxide and t-butyl chloride be used for the preparation of t-butyl ethyl ether? Give suitable explanation. Justify your answer by suggesting the appropriate starting material required for preparation of t-butyl ethyl ether.
Identify A and B in each of the following reaction sequence:
(a) \[ CH_3CH_2Cl \xrightarrow{NaCN} A \xrightarrow{H_2/Ni} B \]
(b) \[ C_6H_5NH_2 \xrightarrow{NaNO_2/HCl} A \xrightarrow{C_6H_5NH_2} B \]

Why is chlorobenzene resistant to nucleophilic substitution reactions?

Which one of the following amines gives an alcohol on reaction with HNO₂?
Out of 2-Bromobutane, 1-Bromobutane, 2-Bromopropane and 1-Bromopropane, the molecule which is chiral in nature is:
Assertion (A): Boiling point of (CH₃)₃N is higher than that of CH₃CH₂CH₂NH₂.
Reason (R): Hydrogen bonding is more extensive in CH₃CH₂CH₂NH₂.
Assertion (A): Acetanilide is less basic than aniline.
Reason (R): Acetylation of aniline results in decrease of electron density on nitrogen.
In the given reaction sequence, the structure of Y would be:
aniline (C6H5NH2)
The reagent that can be used to convert benzenediazonium chloride to benzene is:
Assertion (A): The solubility of aldehydes and ketones in water decreases with increase in size of the alkyl group.
Reason (R): Aldehydes and ketones have dipole-dipole interaction.
Which by-product is obtained in the manufacture of phenol from cumene ?
Williamson synthesis of preparing unsymmetrical ether is:
Assertion (A): Hydrolysis of an ester follows first order kinetics.
Reason (R): The concentration of water does not get altered much during the reaction.
Alkenes are formed by heating alcohols with conc. H$_2$SO$_4$. The first step in the reaction is:
Hofmann Bromamide degradation reaction is given by:
Assertion (A): n-Butyl chloride has higher boiling point than n-Butyl bromide.
Reason (R): C—Cl bond is more polar than C—Br bond.

Alkyl halides undergoing nucleophilic bimolecular substitution reaction involve: 

Which reagents are required for one step conversion of chlorobenzene to toluene?
Which is the correct IUPAC name for
$\text{CH}_3$
The conversion of phenol to salicylic acid can be accomplished by
Pyranose ring of glucose is formed due to the reaction between:
In the Hinsberg method for separation of primary, secondary, and tertiary amines, the reagent used is:
CH3CH2CHO and CH3CH2COOH can be distinguished by:
The gas evolved when methylamine reacts with HNO\textsubscript{2 is:}