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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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11 Questions around this concept.

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On complete combustion, 0.246 g of an organic compound gave 0.198 g of $\mathrm{CO}_2(\mathrm{~g})$ and 0.1014 g of water. The $\%$ of hydrogen in the compound is

3.58%

4.58%

5.58%

6.58%

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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).

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

Qualitative Analysis of Organic Compounds Current Topic

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Qualitative Analysis of Organic Compounds

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Carius Method

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Reference Books

Test for Hydrogen and Carbon

Chemistry Part II Textbook for Class XI

Page No. : 362

Line : 12

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