Erwin Smith > OC Tests > Flashcards

OC Tests Flashcards

(57 cards)

Study These Flashcards
1
Q

What does bromine water test detect

A

Alkenes and alkynes decolourisation of reddish brown Br2 water

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2
Q

What happens when an alkene reacts with Br2 in CCl4

A

Reddish brown color disappears

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3
Q

Baeyer’s test is used for

A

Alkenes decolourisation of pink violet cold dilute KMnO4

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4
Q

Observation in Baeyer’s test

A

Decolourisation and formation of brown MnO2

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5
Q

Tollen’s test is used for which unsaturation

A

Terminal alkynes

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6
Q

Positive Tollen’s test for terminal alkyne gives

A

White precipitate of silver acetylide

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7
Q

Ammoniacal cuprous chloride test detects

A

Terminal alkynes

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8
Q

Observation in ammoniacal Cu2Cl2 test for terminal alkyne

A

Brick red precipitate of copper acetylide

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9
Q

Ceric ammonium nitrate CAN test is used for

A

Alcohols

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10
Q

Positive CAN test observation

A

Red color complex

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11
Q

Lucas test differentiates

A

Primary secondary and tertiary alcohols

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12
Q

Reaction time for tertiary alcohols in Lucas test

A

Immediate turbidity

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13
Q

Reaction time for secondary alcohols in Lucas test

A

1 to 5 minutes turbidity

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14
Q

Reaction time for primary alcohols in Lucas test

A

Very slow 10 minutes to days

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15
Q

Why does layer separation help in Lucas test

A

Alcohols are soluble but alkyl halides formed are insoluble

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16
Q

Iodoform test is given by which alcohols

A

C double bond o single ch3 and c single oh single h single ch3

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17
Q

Observation in iodoform test

A

Yellow precipitate of CHI3

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18
Q

Which carbonyl compounds give iodoform test

A

Methyl ketones CH3 CO R

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19
Q

2 4 DNP test detects

A

Aldehydes and ketones

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20
Q

Color of 2 4 DNP derivative for aldehyde

A

Red

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21
Q

Color of 2 4 DNP derivative for aromatic aldehyde

A

Yellow

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22
Q

Color of 2 4 DNP derivative for ketone

A

Orange

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23
Q

Schiff’s test differentiates between and colour of it after reaction with both

Study These Flashcards
A

Aldehydes pink positive and ketones colourless negative

24
Q

Positive Schiff’s test gives which color

25
NaHCO3 test is for which functional group
Carboxylic acids
26
Observation in NaHCO3 test
Effervescence due to CO2
27
Why phenols fail NaHCO3 test
Phenols are weaker acids cannot liberate CO2
28
Esterification test checks for
Carboxylic acids fruity smell of ester with alcohol and conc H2SO4
29
Carbylamine test detects which amine
Only primary amines
30
Observation in carbylamine test
Foul smell of isocyanide
31
Azo dye test is given by
Primary aromatic amines
32
Azo dye test product color with phenol
Orange dye
33
Azo dye test product color with aniline
Yellow dye
34
Hinsberg test differentiates
Primary secondary tertiary amines
35
Primary amine in Hinsberg test gives
Sulphonamide soluble in alkali
36
Secondary amine in Hinsberg test gives
Sulphonamide insoluble in alkali
37
Tertiary amine in Hinsberg test gives
No reaction
38
FeCl3 test detects which functional group
Phenols
39
Observation in FeCl3 test for phenol
Violet complex
40
Bromine water test for phenol gives
White precipitate of tribromophenol
41
Victor Meyer test differentiates
Primary secondary tertiary alcohols
42
Color for primary alcohol in Victor Meyer test
Red
43
Color for secondary alcohol in Victor Meyer test
Blue
44
Color for tertiary alcohol in Victor Meyer test
Colorless
45
Tollen’s test detects
Aldehydes aliphatic and aromatic
46
Positive Tollen’s test observation
Silver mirror or silver precipitate
47
Fehling’s and Benedict’s tests detect
Only aliphatic Aldehydes not ketones not aromatic aldehydes
48
Observation in Fehling’s Benedict’s
Brick red Cu2O precipitate
49
Carbonyl compounds that do not give Fehling Benedict
Aromatic aldehydes and ketones
50
Phenolphthalein dye test is used for
Distinguishing cresols and other phenols by color
51
What is Fehling's Solution A?
Aqueous Copper(II) Sulfate solution
52
What is Fehling's Solution B?
Alkaline solution of Sodium Potassium Tartrate (Rochelle salt)
53
What is Fehling Solution A?
Aqueous copper sulphate (CuSO4) solution
54
What is Fehling Solution B?
Alkaline sodium potassium tartrate (Rochelle salt) + NaOH
55
In Fehling test what is mixed ratio of A and B?
Equal volumes (50:50) before use
56
In Tollens test Ag+ is reduced to what?
Metallic silver (Ag) forming silver mirror/precipitate
57
In Fehling test Cu2+ is reduced to what?
Cu2O (cuprous oxide) red-brown precipitate
Erwin Smith
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