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Questions and Answers
What is the physical state of aniline under normal conditions?
What is the physical state of aniline under normal conditions?
- Liquid (correct)
- Solid
- Plasma
- Gas
What is the color of aniline?
What is the color of aniline?
- Reddish brown (correct)
- Green
- Yellow
- Blue
What happens when aniline is treated with $FeCl_3$?
What happens when aniline is treated with $FeCl_3$?
- Red color appears after warming (correct)
- Yellow precipitate forms
- No change in color
- Blue color appears
What type of reaction is Diazonium salt formation?
What type of reaction is Diazonium salt formation?
What is the appearance of aniline hydrochloride?
What is the appearance of aniline hydrochloride?
What color is aniline hydrochloride?
What color is aniline hydrochloride?
What is the solubility of aniline hydrochloride in water?
What is the solubility of aniline hydrochloride in water?
What happens when aniline hydrochloride undergoes a test with $Na_2CO_3$?
What happens when aniline hydrochloride undergoes a test with $Na_2CO_3$?
What is observed when testing for the acid radical ($HCl$)?
What is observed when testing for the acid radical ($HCl$)?
What is the color of p-Toluidine?
What is the color of p-Toluidine?
What is the action of 30% $NaOH$ on 2,4-Dinitrophenylhydrazine?
What is the action of 30% $NaOH$ on 2,4-Dinitrophenylhydrazine?
What is the appearance of the precipitate when aniline sulphate reacts with a diazonium salt?
What is the appearance of the precipitate when aniline sulphate reacts with a diazonium salt?
What happens when aniline is treated with concentrated $H_2SO_4$?
What happens when aniline is treated with concentrated $H_2SO_4$?
What type of odor is associated with Deamination with alkaline sodium stannite?
What type of odor is associated with Deamination with alkaline sodium stannite?
What is the condition of p-Toluidine crystals?
What is the condition of p-Toluidine crystals?
What is the odor of aniline when oily droplets are formed?
What is the odor of aniline when oily droplets are formed?
What is observed after warming $FeCl_3$?
What is observed after warming $FeCl_3$?
What type of odor is associated with Acetylation & Benzoylation?
What type of odor is associated with Acetylation & Benzoylation?
Is p-Toluidine soluble in $H_2O$?
Is p-Toluidine soluble in $H_2O$?
What happens to 2,4-Dinitrophenylhydrazine in a chromic acid test?
What happens to 2,4-Dinitrophenylhydrazine in a chromic acid test?
What is the test for Acid radical?
What is the test for Acid radical?
What is the state of Aniline hydrochloride crystals?
What is the state of Aniline hydrochloride crystals?
What is the color change of sulfate salt?
What is the color change of sulfate salt?
What is the functional group solubility of Aniline?
What is the functional group solubility of Aniline?
Flashcards
2,4-Dinitrophenylhydrazine Test
2,4-Dinitrophenylhydrazine Test
A functional group test for aldehydes and ketones, forming a colored precipitate or oil.
Ferric Chloride (FeCl3) Test
Ferric Chloride (FeCl3) Test
Tests for phenols. It produces a color change with phenols.
Diazonium Salt Formation
Diazonium Salt Formation
Aromatic primary amines react with nitrous acid to form diazonium salts, which then undergo coupling reactions.
Diazo-Coupling
Diazo-Coupling
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Hydrolysis (amine)
Hydrolysis (amine)
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Deamination
Deamination
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Acetylation & Benzoylation
Acetylation & Benzoylation
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Test for acid radical (HCl)
Test for acid radical (HCl)
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Aniline odor
Aniline odor
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Aniline condition
Aniline condition
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Aniline color
Aniline color
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P-Toluidine condition
P-Toluidine condition
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P-Toluidine Color
P-Toluidine Color
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Aniline solubility
Aniline solubility
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Aniline hydrochloride condition
Aniline hydrochloride condition
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Aniline hydrochloride color
Aniline hydrochloride color
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Aniline hydrochloride solubility
Aniline hydrochloride solubility
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Study Notes
- Table (1) outlines tests performed on aniline, p-toluidine, and aniline hydrochloride, detailing their physical characteristics and chemical reactions.
Aniline
- Physical characteristics: liquid, mobile, true liquid, reddish-brown color, fishy odor.
- Functional group chemical tests: insoluble in H₂O and dilute NaOH, but soluble in dilute HCl and reprecipitation after the addition of 30% NaOH-basic.
- 2,4-Dinitrophenylhydrazine: no yellow-orange precipitate or oil.
- Chromic acid test: no change to the orange color.
- Action of 30% NaOH: no action on cold or in heat.
- Action of FeCl₃: olive-green color after warming.
- Action of conc. H₂SO₄: white precipitate of aniline sulphate.
- General Class Reactions: oily droplets of free aniline + fishy odor.
P-Toluidine
- Physical characteristics: solid, crystalline plates, pale buff color, stable-like odor.
- Functional group chemical tests: insoluble in H₂O and dilute NaOH, soluble in dilute HCl and reprecipitation after addition of 30% NaOH-basic.
- Action of FeCl₃: red color after warming.
- General Class Reactions:
- Diazonium salt formation: scarlet red precipitate of azo-dye.
Aniline Hydrochloride
- Physical characteristics: solid, crystalline macrocrystals, grayish-green color, characteristic odor.
- Functional group chemical tests: soluble in H₂O, L.P→acidic, Na₂CO₃ test→strong acid.
- Action of FeCl₃: green color.
- Special tests: effervescence of HCl gas.
- Test for acid radical (HCl): white precipitate.
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