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Chemistry > Organic Identification > Flashcards

Organic Identification Flashcards

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1
Q

Turns moist red litmus paper blue

A

Amine

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2
Q

Turns moist blue litmus paper red

A

Carboxylic acid

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3
Q

Turns UI solution green to blue

A

Amine

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4
Q

Turns UI solution from green to orange

A

Carboxylic acid

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5
Q

Turns Cr2O7 -2/H+ (aq) to Cr 3+ (aq), colour change orange to green when heated

A

Primary alcohol
Secondary alcohol
Aldehyde

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6
Q

Turns MnO4 -/H+ (aq) to Mn 2+ (aq), colour change purple to colourless when heated

A

Primary alcohol
Secondary alcohol
Aldehyde

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7
Q

Turns MnO4 -/H+ to Mn 2+, colour change purple to colourless, no heat needed

A

Alkene (makes diol)

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8
Q

Turns MnO4- to MnO2, colour change purple to brown precipitate, no heat needed

A

Alkene (makes diol)

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9
Q

Reacts with NaHCO3 or NaCO3 producing colourless gas

A

Carboxylic acid (gas is CO2)

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10
Q

Reacts with Mg producing colourless gas

A

Carboxylic acid (gas is H2)

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11
Q

Has a rotten, decomposing or fishy smell

A

Amine

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12
Q

Has a ‘sharp’ or vinegary or vomit smell

A

Carboxylic acid

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13
Q

Rapidly decolourises organe bromine water, Br2

A

Alkenes
Alkynes

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14
Q

Slowly decolourises orange bromine water, Br2, needing uv light and/or heat

A

Alkanes

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15
Q

Often has a pleasant or fruity smell

A

Ester

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16
Q

Reacts vigorously/violently with water making fumes of HCl

A

Acid/acyl chloride

17
Q

Reacts with blue Cu 2+ (aq) to form a deep blue solution

A

Amine

18
Q

Gives a silver mirror with Tollens’ reagent, Ag +/NH3

A

Aldehyde

19
Q

Gives a red/orange precipitate of Cu2O with Benedict’s solution or Fehling’s reagent, Cu 2+

A

Aldehyde

20
Q

Releases NH3 gas if heated with NaOH

A

Amide

Chemistry (2 decks)

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