Podcast
Questions and Answers
What reagent is used to detect 1ᴼ, 2ᴼ, and 3ᴼ alcohols in the Lucas Test?
What reagent is used to detect 1ᴼ, 2ᴼ, and 3ᴼ alcohols in the Lucas Test?
- Tollen's Reagent
- AgNO2
- Concentrated HCl (correct)
- Anhydrous AlCl3
Which compound forms a white ppt of AgCl in the Lucas Test?
Which compound forms a white ppt of AgCl in the Lucas Test?
- Tertiary alcohol
- Haloalkane
- Primary alcohol (correct)
- Secondary alcohol
Which functional group reacts with [Ag(NH3)2]⁺ to form a silver mirror in Tollen's Reagent test?
Which functional group reacts with [Ag(NH3)2]⁺ to form a silver mirror in Tollen's Reagent test?
- Carboxylic acid
- Ketone
- Aldehyde (correct)
- Ester
Which compound reacts with NaHCO3 to produce CO2 gas?
Which compound reacts with NaHCO3 to produce CO2 gas?
What is the product formed in the Iodoform Test involving an aldehyde or ketone with at least one CH3 group?
What is the product formed in the Iodoform Test involving an aldehyde or ketone with at least one CH3 group?
What type of bonds must be present in a compound to undergo Bayer's Test and decolorize?
What type of bonds must be present in a compound to undergo Bayer's Test and decolorize?
Aldehydes react with [Ag(NH3)2]+ to form a silver mirror in Tollen's Reagent test.
Aldehydes react with [Ag(NH3)2]+ to form a silver mirror in Tollen's Reagent test.
Ketones react with [Ag(NH3)2]+ to form a silver mirror in Tollen's Reagent test.
Ketones react with [Ag(NH3)2]+ to form a silver mirror in Tollen's Reagent test.
In the Lucas Test, 1ᴼ alcohols show immediate turbidity when treated with AgNO2.
In the Lucas Test, 1ᴼ alcohols show immediate turbidity when treated with AgNO2.
The Iodoform Test is used to detect aldehydes and ketones that have at least one CH3 group.
The Iodoform Test is used to detect aldehydes and ketones that have at least one CH3 group.
NaHCO3 reacts with carboxylic acids to produce CO2 gas.
NaHCO3 reacts with carboxylic acids to produce CO2 gas.
Bayer's Test is used to detect aliphatic and aromatic primary amines.
Bayer's Test is used to detect aliphatic and aromatic primary amines.
Study Notes
Distinction Tests
- Lucas Test: distinguishes between 1ᴼ, 2ᴼ, and 3ᴼ alcohols using Conc. HCl and anhydrous AlCl₃
- AgNO₂ Test: distinguishes between haloalkanes and haloarenes
- Tollen's Reagent: detects aldehydes and ketones in alkaline medium, forming a silver mirror (Ag)
- Fehling's Test: detects aldehydes and ketones (including aromatic aldehydes), forming a red-brown ppt (Cu₂O)
Iodoform Test
- detects aldehydes and ketones with at least one CH₃ group
- reaction: NaOH + I₂ → CHI₃ (yellow ppt)
NaHCO₃ Test
- detects RCOOH and phenol
- reaction: RCOOH + NaHCO₃ → RCOONa + CO₂↑
2,4 DNP Test
- detects either RCHO or ketone
Bayer's Test
- detects double or triple bonds in straight-chain compounds
- reaction: Br₂ / H₂O → decolorization
Azo-Dye Test
- detects 1ᴼ amines in aliphatic and aromatic compounds
- reaction: HNO₂ + β-naphthol → orange dye (insoluble in water)
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Description
This quiz covers the distinction between Reagent Lucas test for 1°, 2°, 3° alcohols, AgNO2 test for Haloalkane & Haloarene, and Tollen's reagent test for Aldehyde & Ketone. It also includes reaction observations, detection methods, and remarks for different chemical compounds.
