30 Questions
What is the primary reason for the observed order of basicity of lower aliphatic amines as secondary > primary > tertiary?
Steric factors, i.e., crowding of alkyl groups
What is the effect of electron-releasing alkyl groups on the basicity of amines?
Increase the electron density around the nitrogen atom
Which of the following types of amines are expected to be stronger bases than ammonia?
All lower aliphatic amines
What is the primary reason for the decrease in solubility of amines with an increase in molecular mass?
Hydrogen bonding between amine and water molecules
What is the primary role of the lone pair of electrons on the nitrogen atom in amines?
Donation to electron-seeking reagents
Which of the following factors affects the basicity of amines?
All of the above
What is the reason acetamide does not show basic nature?
Due to resonance stabilization
Which type of amines undergoes the carbylamine reaction?
Primary amines
What is the result of the reaction of amines with mineral acids?
Formation of alkylammonium salts
Which of the following is a characteristic of the solutions of amines?
Alkaline in nature
What is the reason behind the increase in boiling points of amines with an increase in molecular mass?
Due to the presence of intermolecular hydrogen bonding
Why are aniline or other aromatic amines less basic than aliphatic amines?
Because the electron density is less on the N atom due to resonance stabilization
What is the effect of resonance stabilization on the basicity of anilinium ion?
It decreases the basicity of the anilinium ion
Why do lower amines have a characteristic ammonia-like smell?
Due to the presence of the nitrogen atom
What is the product formed when an amine hydrochloride is distilled with NaOH?
Primary amine
What is the odour of alkyl cyanides?
Pleasant, similar to bitter almonds
What is the solubility of alkyl cyanides in water?
Decreases with the increase in number of carbon atoms
What is the product formed when methyl cyanide is hydrolysed?
Acetic acid and ammonia
What is the characteristic of alkyl isocyanides?
Colourless, unpleasant smelling liquids
What is the product formed when an alkyl cyanide is reduced with lithium aluminium hydride?
Primary amine
What is the main product formed when methyl chloride reacts with AgCN?
Methyl isocyanide
Which of the following reactions is used to detect primary amino groups?
Carbylamine reaction
Why are alkyl isocyanides used in detection of very minute leakage?
Due to their unpleasant smell
What is the characteristic of isocyanides compared to cyanides?
Isocyanides are less polar than cyanides
What is the major difference in the smell of ethyl cyanide and ethyl isocyanide?
Ethyl cyanide has a strong but pleasant smell, while ethyl isocyanide has an extremely unpleasant smell.
What was the gas responsible for the Bhopal gas tragedy in 1984?
Methyl isocyanate
What is the product formed when ethyl cyanide is hydrolyzed with acids?
Propionic acid
What is the general formula for the reduction of nitro compounds to form amines?
R - NO2 + 6[H] → RNH2 + 2H2O
What is the name of the reaction that reduces nitriles to form amines?
Mendius reaction
What is the general classification of amines based on the number of alkyl groups attached to the nitrogen atom?
Primary, secondary, and tertiary
Explore the structure, solubility, and chemical properties of amines, including their reactions and electrophilic nature due to the presence of a lone pair of electrons on the nitrogen atom.
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