11Carbylamine for amino (bad smell)?
Give the method used in practical chemistry lab for the Detection and Identification of amino and nitro functional groups.
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7 Answers
3amines can be detected by reacting the amines with nitrous acid
primary amine will give benzene diazonium chloride and then the nitrogen gas ceases to give a clear solution
secondary amine will give yellow oily product
aryl amine on reacting with nitrous acid gives diazonium chloride which on reaction with β napthol to give a orange azo dye
3on reacting the nitro cpds with Zn/NH4Cl gives a hydroxyl amine which leads to in pH and therefore in finding the change of pH of the soln it can be identified
but i think this will not be a confirmatory test sir
1For Detection of Amino Acid Group
1.CARBYLAMINE TEST:
To 1ml of the Organic Compound add 1ml of Concentrated HCl,five drops of CHCl3 and 2ml of alcoholic potash.Warm the Test tube.
Then U'll get Offensive Smelling gas
2LITMUS TEST:
Keep a Pinch of the Organic compound on a moist red Litmus Paper.
Then U'll See Red Litmus turns Blue...........
11machan, will diazotization work in non aniline compounds? [7]
3no machan i think dat it may work but the diazonium salt formed will be unstable only for amino cpds and so they will easily liberate N2 gas da
13Mulliken and barker's test in detection of nitro group
sample+Zn+NH4OH+alcohol---->heat,filter,filtrae +tollens reagent ---->black/silver ppt,nitro present
