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FAQs on Question Bank: Amines - Chemistry Class 12 - NEET

1. What are amines and what is their role in organic chemistry?
Ans. Amines are organic compounds that contain nitrogen as their primary functional group. They are formed by replacing one or more hydrogen atoms of ammonia with an alkyl or aryl group. Amines play a crucial role in organic chemistry as they are involved in several important biological processes and are commonly used in the synthesis of pharmaceuticals, dyes, and polymers.
2. How are amines classified?
Ans. Amines are classified based on the number of alkyl or aryl groups attached to the nitrogen atom. Primary amines have one alkyl or aryl group, secondary amines have two, and tertiary amines have three. They can also be classified as aliphatic or aromatic based on the type of carbon atom to which the nitrogen is attached.
3. What are the properties of amines?
Ans. Amines are polar compounds with a characteristic ammonia-like odor. They have lower boiling points than alcohols of comparable molecular weight due to the absence of hydrogen bonding between the nitrogen atoms. Amines also exhibit basic properties due to the lone pair of electrons on the nitrogen atom, which can accept a proton to form a positively charged ion.
4. What are the applications of amines in industry?
Ans. Amines have a wide range of applications in industry. They are used as intermediates in the production of pesticides, pharmaceuticals, and dyes. They are also used as solvents, corrosion inhibitors, and surfactants. Amines are used in the production of rubber, plastics, and polyurethane foams, and they are added to asphalt to improve its properties.
5. What are the health hazards associated with amines?
Ans. Amines can be toxic and harmful if inhaled, ingested, or absorbed through the skin. They can cause irritation of the eyes, nose, and throat, and prolonged exposure can lead to respiratory problems. Some amines are carcinogenic and mutagenic and can cause DNA damage. It is important to handle amines with care and use appropriate protective equipment when working with them.
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