Aim: To test the presence of IYU.
aldehydic group in the given organic compound
EXPERIMENT OBSERVATION INERENCE
Schiffs reagent test
To about 1 mL of the
organic |A deep red or purplc Aldelydic group
compound add I mL of Schiff's coburation is produced. present
Ieagent.
Tollen's reagent test:
Mix equal volumes of AgNO, and
NaOH solutiorn Shake well allow the
grey ppt. to sette down. Decant of
the supematant hquid.To the ppt. add A grey ppt. or metalic a
NH,OH solution dropwise ill the grey siver mirror is obtained Aldehydic group
Ppt. dissolves. Now add about I mL along the
side-of the testpresent. .
of the orgamc compound to the above ube.
freshly prepared Tollen's reagent.
Keep the test ube in boiling water
bath for 2 minutes.
Fehlings solution test
Mix equal volures of Fehlings solution
A and B in a test tube. Add about 1
mL of the organic compound to it A red ppt. is forned. Aldehydic group
.Keep the test tube in boiling water conbimed.
bath for 2 minutes.
Reactions involved:
Tollens Test Mapl
AgNO, + NaOH A g O H + NaN)
9ar
AgOH+2NH,OH-iAgNi):I*OH-2H,G
Tollen's reayent Propa
rro
RCHO21AyiNH),)+
AIdchyde
3OH
RCO0+ 4NH, +2 Ag 21,
Siiey nisror
Carbovistc
on or pp
Fehlings test
RCHO+2Cu* +50H
Jdchyoc
RCOO+Cu0 + 3H,G
Canbaxyiatc ien Red pi.
Kesut: The
given organic compounl contains an aldehydic group(-CHO).
aldehydic group in the given organic compound
EXPERIMENT OBSERVATION INERENCE
Schiffs reagent test
To about 1 mL of the
organic |A deep red or purplc Aldelydic group
compound add I mL of Schiff's coburation is produced. present
Ieagent.
Tollen's reagent test:
Mix equal volumes of AgNO, and
NaOH solutiorn Shake well allow the
grey ppt. to sette down. Decant of
the supematant hquid.To the ppt. add A grey ppt. or metalic a
NH,OH solution dropwise ill the grey siver mirror is obtained Aldehydic group
Ppt. dissolves. Now add about I mL along the
side-of the testpresent. .
of the orgamc compound to the above ube.
freshly prepared Tollen's reagent.
Keep the test ube in boiling water
bath for 2 minutes.
Fehlings solution test
Mix equal volures of Fehlings solution
A and B in a test tube. Add about 1
mL of the organic compound to it A red ppt. is forned. Aldehydic group
.Keep the test tube in boiling water conbimed.
bath for 2 minutes.
Reactions involved:
Tollens Test Mapl
AgNO, + NaOH A g O H + NaN)
9ar
AgOH+2NH,OH-iAgNi):I*OH-2H,G
Tollen's reayent Propa
rro
RCHO21AyiNH),)+
AIdchyde
3OH
RCO0+ 4NH, +2 Ag 21,
Siiey nisror
Carbovistc
on or pp
Fehlings test
RCHO+2Cu* +50H
Jdchyoc
RCOO+Cu0 + 3H,G
Canbaxyiatc ien Red pi.
Kesut: The
given organic compounl contains an aldehydic group(-CHO).
