Questions Bank
Practical organic chemistry 231chem
Q1: Write the chemical structure of the following compounds?
Compound
Structure
Compound
Calcium
oxalate.
Calcium
tartarate
Fehling B
Fehling A
Aniline
hydrochloride.
Aniline
sulphate
Urea
Deing’s 1
Amm. benzoate
Sodium
salicylate
Phthalic acid
Citric acid
Deing’s 2
α-napthol
Barfoed reagent
Amm.
Citrate
Sod. Tartarate
Oxalic acid
Citric acid
β-naphthol
Structure
Q2: How can differentiate between each pair from the following compounds (by
one chemical experiment)?
 Lactose and sucrose.
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 Ammounium benzoate and sodium phthalate.
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 Starch and oxalic acid.
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 Urea and ammonium benzoate.
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 Aniline hydrochloride and aniline sulphate.
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 Sodium oxalate and oxalic acid.
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 Ammounium citrate and citric acid.
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 Tartaric acid and salicylic acid.
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 Oxalic acid and aniline hydrochloride.
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Q3: Complete the following tables?
a. …………………
Experiment
Observation
Results
Molish test
………………….
There is no carbohydrates
Acidity test
-ve
…………………….
Effect of NaOH
…………………….
FeCl3
…………………….
White ppt after boiling
Ammonium salt
Ammonium oxalate or
tartarate or citrate
…………………….
…………………….
Ammonium citrate
Observation
Results
Molish test
………………….
Acidity test
…………………….
Azo-dye test
…………………….
There is no carbohydrates
Carboxylic acid or aniline
salt
Aniline salt
White ppt
…………………….
…………………….
Aniline hydrochloride
Observation
Results
Violet ring spread by shaking
…………………….
…………………….
Mono or disaccharide
+ve
…………………….
Rapid furfural
d. ………………….
…………………….
Fructose
Experiment
Observation
Results
………………….
-ve
-ve
There is no carbohydrates
…………………….
…………………….
Sodium phthalate or
benzoate
Sodium phthalate
With my best wishes
CaCl2 test
Deing's test
b. …………
Experiment
AgNO3
BaCl2
c. …………..
Experiment
Molish test
I2 test
Barfoed test
Molish test
Acidity test
Effect of NaOH
FeCl3
…………………….
Phthaline test
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