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Question

Liebig's combustion method is used for the quantitative estimation of_________.

A
C and H
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B
Halogens
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C
S andP
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D
N
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Solution

The correct option is D C and H
Estimation of carbon and Hydrogen by Liebig's method
rinciple A known mass of organic compound is heated in the presence of pure oxygen. The carbon dioxide and water formed are collected and weighed. The percentages of carbon and hydrogen in the compound are calculated from the masses of carbon dioxide and water. Estimation of carbon and hydrogen in an organic compound is based on their conversion to CO, and H2O respectively.
The percentage of carbon and hydrogen are calculated from the masses of CO2 and H2O.

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