Download Conc. H 2 SO 4 On cold

ALCOHOLS
Aliphatic
Methanol
Ethanol
Aromatic
Glycerol
Benzyl alcohol
Methanol
Ethanol
Glycerol
Benzyl alcohol
Physical properties:
State
Liquid, mobily, true
Liquid, viscous, true
Color
Colorless
Odor
Characteristic odor
Liquid, oily, true
Butter almond odor
Ignition test:
Inflammability
Change in
appearance
Change in odor
Color imparted
to the flame
Residue
Comment
Inflammable, non luminous, non smoky
Inflammable,
luminous, smoky
Volatilization
No change
No change
No residue
The compounds are aliphatic
The compound is aromatic
Acid– base properties: [Solubility or Miscibility]
Methanol
H2O
L.P.
Dil. HCl
Ethanol
Glycerol Benzyl alcohol
Miscible in H2O
Immiscible
No change
Immiscible
10% NaOH
Immiscible
Conc.
H2SO4
Immiscible
Comment:
All the compounds are neutral
Preliminary test:
Methanol
Soda lime
On cold:
On hot:
30% NaOH
Ethanol Glycerol Benzyl alcohol
Not done
(only for solid)
On cold:
On hot:
No reaction in all
FeCl3
On cold:
On hot:
Conc. H2SO4
On cold:
On hot:
No reaction in all
Benzyl alcohol + 3-4 drops Conc. H2SO4 (on the wall)
No reaction in all
Dirty gleatinous white ppt
Not done
General test:
Oxidation test:
OX.
Methanol
Ethanol
OX.
Benzyl alcohol
OX.
Formaldehyde
Acetaldehyde
OX.
OX.
Benzaldehyde
Formic acid
Acetic acid
OX.
Benzoic acid
Methanol
Ethanol
Specific test:
1. Iodoform test
Alcohol + 10% NaOH + xss I2
No yellow ppt
Yellow ppt
Methanol
Specific test:
2. Esterification test
Ethanol
Specific test:
3. Borax test for glycerol
Borax + H2O (to dissolve it) + 2 drops ph.ph. + glycerol
Disappearance of pink color (( glycerol borate))
very strong acid
4. Conc. H2SO4 test for benzyl alcohol
Benzyl alcohol + Conc. H2SO4
Dirty white gelatinous ppt
IR
Location
3500 – 3200 cm -1
< 3000 cm -1
> 3000 cm -1
Comment
OH functional gp streatching band
CH aliphatic streatching band
CH aromatic streatching band