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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

    Quick Facts

    • 12 Questions around this concept.

    Solve by difficulty

    QuestionEASY

    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

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    Match List-I with List-II -

      List-I
    (Separation of)    		   List-II
    (Separation
    Technique)
    (A) Aniline from aniline-water mixture (I) Simple distillation
    (B) Glycerol from spent-lye in the soap industry (II) Fractional distillation
    (C) Different fractions of crude oil in the petroleum industry (III) Distillation at reduced pressure
     (D)  Chloroform- Aniline mixture  (IV)  Steam distillation

    Choose the correct answer from the options given below :

    View Solution

    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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    Books

    Reference Books

    Test for Hydrogen and Carbon

    Chemistry Part II Textbook for Class XI

    Page No. : 362

    Line : 12

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