B.Sc.First Year Online Practical Examination In Chemistry

17 Questions | Total Attempts: 99

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B.Sc.First Year Online Practical Examination In Chemistry

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Questions and Answers
  • 1. 
    The element which cannot be detected through Lassaigne’s test is
    • A. 

      Sulphur

    • B. 

      Oxygen

    • C. 

      Nitrogen

    • D. 

      Chlorine

  • 2. 
    The element which cannot be detected through Lassaigne’s test is
    • A. 

      Sulphur

    • B. 

      Oxygen

    • C. 

      Nitrogen

    • D. 

      Chlorine

  • 3. 
    The element which cannot be detected through Lassaigne’s test is
    • A. 

      Sulphur

    • B. 

      Oxygen

    • C. 

      Nitrogen

    • D. 

      Chlorine

  • 4. 
    The ionic compound formed during the fusion of 1,2-Dichloro benzene with sodium metal is AgCN
    • A. 

      True

    • B. 

      False

  • 5. 
    Functional group present in Aniline is
  • 6. 
    Fuctional group present in above structure are
    • A. 

      Carboxylic Acid

    • B. 

      Phenolic OH

    • C. 

      Carbonyl Group

    • D. 

      Ketone  

  • 7. 
    Above Apparatus used for determination of 
    • A. 

      Surface tension

    • B. 

      Melting point

    • C. 

      Freezing point

    • D. 

      Viscosity

  • 8. 
    The Force of  friction between two layers of a liquid moving past one another with different velocities is 
    • A. 

      Surface tension

    • B. 

      Viscosity

    • C. 

      Density

    • D. 

      Refractive index

  • 9. 
    Which of the following express the Unit of Viscosity
    • A. 

      Dyne second Cm-1

    • B. 

      Centipoise

    • C. 

      Kg m-1 S-1

    • D. 

      All of the above

  • 10. 
    What is the effect of temperature on Viscosity?
    • A. 

      Decreases

    • B. 

      Increases

    • C. 

      Remain constant

    • D. 

      Can not be predicted

  • 11. 
    The existence of strong intermolecular forces of attraction in liquids gives rise to important property known as--
    • A. 

      Boiling point

    • B. 

      Surface tension

    • C. 

      Viscosity

    • D. 

      Optical activity

  • 12. 
    SI unit of suface tension 
    • A. 

      Nm-1

    • B. 

      Dynes cm-1

    • C. 

      Both

    • D. 

      None of these

  • 13. 
    compound parachor value Ethane 110.5 propane 150.8 Butane 190 from the data given above Parachor value of CH2 group is -----------
  • 14. 
    Following reaction take place during preparation of Lassaigne extract.
    • A. 

      True

    • B. 

      False

  • 15. 
    Below reaction is used in confirmation of   --------  element during  element detection  process.
    • A. 

      Nitrogen

    • B. 

      Sulhur

    • C. 

      Halogen

    • D. 

      None of these

  • 16. 
    What will be the colour of final compound formed in given reaction
    • A. 

      Orange-red

    • B. 

      Orange

    • C. 

      Blue

    • D. 

      Colourless

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