Organic Compounds Containing Nitrogen — Flashcards
ICSE · Class 12 · Chemistry
55 flashcards for Organic Compounds Containing Nitrogen (ICSE Class 12 Chemistry) to test yourself on key terms and facts. Sample: "What are amines?"
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What are amines?
Answer
Amines are alkyl or aryl derivatives of ammonia. They are classified as 1° amines, 2° amines, and 3° amines depending on whether one, two, or three hydrogen atoms of ammonia are replaced by alkyl or a…
Why are amines basic?
Answer
Amines act as bases because the nitrogen atom has a lone pair of electrons. This lone pair accepts a proton, so amines behave as Lewis bases.
What is the basic strength order of aliphatic amines?
Answer
The basic strength order of aliphatic amines is: 2° amine > 1° amine > 3° amine.
Arrange these in increasing basic strength: Aniline, N-methylaniline, ammonia, methylamine, dimethylamine.
Answer
Increasing order of basic strength: Aniline < N-methylaniline < NH3 < CH3NH2 < (CH3)2NH.
Why are arylamines less basic than alkylamines?
Answer
In arylamines, the lone pair on nitrogen is partly shared with the benzene ring by resonance, so it is less available for accepting a proton. In alkylamines, the alkyl group increases electron density…
Why are o-substituted anilines usually less basic than aniline?
Answer
Ortho-substituted anilines usually show lower basic strength due to the ortho effect, regardless of the nature of the substituent.
State the boiling point order of amines.
Answer
The boiling point order of amines is: 1° amine > 2° amine > 3° amine.
What is Hinsberg's reagent and what is its use?
Answer
Hinsberg's reagent is benzenesulphonyl chloride, C6H5SO2Cl. It is used with KOH to distinguish 1°, 2°, and 3° amines in Hinsberg's test.
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