The correct answer is: A. Carius method
The Carius method is a chemical method for the determination of nitrogen in organic compounds. It is based on the principle that nitrogen in organic compounds is converted to ammonium nitrate by heating the compound with fuming nitric acid. The ammonium nitrate is then precipitated as ammonium molybdate, which can be weighed to determine the amount of nitrogen in the original compound.
The Victor-Meyer’s method is a chemical method for the determination of the molecular weight of organic compounds. It is based on the principle that the vapor pressure of a liquid is proportional to its molecular weight. The molecular weight of an organic compound can be determined by measuring the vapor pressure of the compound and comparing it to the vapor pressure of a known compound.
The Liebig’s method is a chemical method for the determination of the carbon and hydrogen content of organic compounds. It is based on the principle that carbon and hydrogen are converted to carbon dioxide and water when the compound is heated in a stream of oxygen. The amount of carbon dioxide and water produced can be measured to determine the amount of carbon and hydrogen in the original compound.
The Dumas method is a chemical method for the determination of the nitrogen content of organic compounds. It is based on the principle that
nitrogen is converted to nitrogen gas when the compound is heated in a stream of hydrogen. The amount of nitrogen gas produced can be measured to determine the amount of nitrogen in the original compound.The Carius method is the most common method for the determination of nitrogen in organic compounds. It is a simple and accurate method that can be used to determine the nitrogen content of a wide variety of organic compounds.