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Qualitative Analysis of Organic Compounds - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main

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  • 4 Questions around this concept.

Concepts Covered - 1

Test for Hydrogen and Carbon

Carbon and hydrogen are detected by heating the compound with copper(II) oxide. Carbon present in the compound is oxidised to carbon dioxide (tested with lime-water, which develops turbidity) and hydrogen to water (tested with anhydrous copper sulphate, which turns blue).

\\\begin{array}{l}{\mathrm{C}+2 \mathrm{CuO} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{Cu}+\mathrm{CO}_{2}} \\\\ {2 \mathrm{H}+\mathrm{CuO} \stackrel{\Delta}{\longrightarrow} \mathrm{Cu}+\mathrm{H}_{2} \mathrm{O}} \\\\ {\mathrm{CO}_{2}+\mathrm{Ca}(\mathrm{OH})_{2} \longrightarrow \mathrm{CaCO}_{3} \downarrow+\mathrm{H}_{2} \mathrm{O}} \\\\ {5 \mathrm{H}_{2} \mathrm{O}+\mathrm{CuSO}_{4} \longrightarrow \mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}}\end{array}
                  White                       Blue

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Test for Hydrogen and Carbon

Study other Related Concepts

Qualitative Analysis of Organic Compounds Current Topic

Purification of Organic Compounds
Qualitative Analysis of Organic Compounds
Lassaigne’s Test - Test for Nitrogen, Sulphur, Halogens
Duma's Method
Kjeldahl's Method
Carius Method

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Test for Hydrogen and Carbon

Chemistry Part II Textbook for Class XI

Page No. : 362

Line : 12

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