International A Level (IAL)ChemistryEdexcelExam Questions4: Rates, Equilibria & Further Organic ChemistryOrganic Analytical Techniques

Organic Analytical Techniques (Edexcel International A Level (IAL) Chemistry): Multiple Choice Questions

Exam code: YCH11

21 mins10 questions

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Organic Analytical Techniques

Easy
Medium
1
1 mark

In HPLC, the mobile and stationary phases are

 

 

Mobile phase

Stationary phase

☐

A

gas

liquid

☐

B

gas

solid

☐

C

liquid

gas

☐

D

liquid

solid

    Choose your answer

    2
    1 mark

    The high resolution mass spectrum of a compound X has a molecular ion peak at m / z = 44.0632. Accurate relative atomic masses are given in the table.

    Element

    Relative atomic mass

    Hydrogen

    1.0079

    Carbon

    12.0000

    Oxygen

    15.9949

    Which of these compounds, with a relative molecular mass of 44, gives rise to this peak?

    Four displayed formulae labelled A to D. A is ethanal, CH3CHO, with a C=O double bond. B is ethenol, CH2=CHOH, with a C=C double bond and an OH group. C is propane, CH3CH2CH3. D is carbon dioxide, O=C=O

      Choose your answer

      1
      1 mark

      The mass spectrum of the compound shown is obtained using a high resolution mass spectrometer.

      q7-paper-5-jan-2022-edexcel-ial-chemistry

      What is the mass to charge ratio, m/ z, of the molecular ion of this compound?

      [Ar values: H = 1.0078    C = 12.0000    O = 15.9949]

      • 92.0261

      • 92.0312

      • 93.0339

      • 93.0390

      Choose your answer

      2a
      1 mark

      This question is about chromatography.

      A spot caused by an amino acid has moved 42 mm from the baseline of a paper chromatogram. The Rf value for the amino acid under these conditions is 0.62.

      What is the distance moved by the solvent?

      • 680 mm

      • 68 mm

      • 42 mm

      • 26 mm

      Choose your answer

      2b
      1 mark

      In gas chromatography, GC, which of these would be the most suitable carrier gas?

      • argon

      • hydrogen

      • methane

      • oxygen

      Choose your answer

      3
      1 mark

      How many peaks are there in the carbon-13 (13C) NMR spectrum of methylcyclohexane?

      q15-paper-5-june-2021-edexcel-ial-chemistry

      • one

      • three

      • five

      • seven

      Choose your answer

      4
      1 mark

      In gas chromatography, a gas containing a mixture is passed over a liquid stationary phase. The main reason a mixture is separated into its components is because they have different

      • boiling temperatures

      • forces of attraction to the liquid

      • relative molecular masses

      • volatilities

      Choose your answer

      5
      1 mark

      In the high resolution proton NMR spectrum of propan-2-ol, CH3CHOHCH3 there are

      • one singlet, one doublet and a heptet

      • one singlet, two doublets and a heptet

      • two singlets and two triplets

      • three singlets and a quartet

      Choose your answer

      6
      1 mark

      A mixture of organic compounds was analysed using thin-layer chromatography.

      The Rf value was 0.92 for one of the components in the mixture.

      What can be deduced about the attractions between that component and the stationary and mobile phases?

       

       

      Attraction between component and stationary phase

      Attraction between component and mobile phase

      ☐

      A

      strong

      strong

      ☐

      B

      strong

      weak

      ☐

      C

      weak

      weak

      ☐

      D

      weak

      strong

        Choose your answer

        7
        1 mark

        The infrared spectrum of an organic compound shows:

        • a very broad absorption extending from approximately 2500 to 3300 cm⁻¹

        • a sharp, strong absorption at approximately 1715 cm⁻¹

        Which functional group is present in the compound?

        • Alcohol

        • Aldehyde

        • Carboxylic acid

        • Ketone

        Choose your answer