Quantitative Analysis of Organic Compounds
Chemistry ⇒ Carbon and Organic Chemistry
Quantitative Analysis of Organic Compounds starts at 11 and continues till grade 12.
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Describe the process of estimating halogens in an organic compound using the Carius method.
Describe the role of potassium dichromate in the estimation of carbon and hydrogen.
Describe the steps involved in the estimation of sulfur in an organic compound using the Carius method.
Explain the principle of the Kjeldahl method for nitrogen estimation in organic compounds.
A 0.2 g sample of an organic compound gave 0.36 g of CO2 and 0.15 g of H2O on combustion. Calculate the percentage of hydrogen in the compound.
A 0.25 g sample of an organic compound containing chlorine was analyzed by the Carius method and gave 0.15 g of AgCl. Calculate the percentage of chlorine in the compound. (Atomic mass: Ag = 108, Cl = 35.5)
A 0.25 g sample of an organic compound gave 0.44 g of CO2 and 0.18 g of H2O on combustion. Calculate the percentage of carbon in the compound.
A 0.3 g sample of an organic compound containing nitrogen was digested by the Kjeldahl method. The ammonia evolved neutralized 25 mL of 0.1 N H2SO4. Calculate the percentage of nitrogen in the compound.
The Lassaigne’s test is used for the detection of which elements in organic compounds? (1) Carbon and hydrogen (2) Nitrogen, sulfur, and halogens (3) Oxygen and phosphorus (4) Only nitrogen
Which gas is evolved during the Dumas method for nitrogen estimation? (1) Ammonia (2) Nitrogen dioxide (3) Nitrogen (4) Nitric oxide
Which method is suitable for the estimation of oxygen in organic compounds? (1) Carius method (2) Dumas method (3) Pyrolysis method (4) Victor Meyer method
Which of the following elements cannot be estimated by the Kjeldahl method? (1) Nitrogen (2) Sulfur (3) Halogens (4) Both (2) and (3)
In the estimation of carbon and hydrogen, the organic compound is oxidized and the products are absorbed in ______ and ______ respectively.
In the estimation of carbon, the mass of CO2 formed is used to calculate the amount of ______ present in the compound.
In the estimation of halogens by the Carius method, the organic compound is heated with ______ and fuming nitric acid.
In the estimation of nitrogen by the Dumas method, the nitrogen gas collected is measured over ______.
True or False: In the estimation of halogens by Carius method, silver nitrate is used to precipitate halide ions as silver halides.
True or False: The Dumas method involves the conversion of nitrogen in an organic compound to nitrogen gas.
True or False: The percentage of hydrogen in an organic compound can be calculated from the mass of water formed during combustion.
True or False: The percentage of oxygen in an organic compound is usually determined by subtracting the sum of the percentages of other elements from 100%.
