STS - Student Testing Service

200 Questions | Total Attempts: 734

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STS - Student Testing Service - Quiz

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Questions and Answers
  • 1. 
    An insulated tube with a movable piston at one end had 500j of heat added to it if during experiement the piston moves and does 75j of work on the atmosphere what change in energy of tube system ?
    • A. 

      775j

    • B. 

      500j

    • C. 

      425

    • D. 

      -75

    • E. 

      -425

  • 2. 
    The oxidation state of Nitrogen is most negative in which of the following compound ?
    • A. 

      N2

    • B. 

      N​​​​​​2​​​​​O

    • C. 

      NO​​​​​2

    • D. 

      NO​​​​​3

    • E. 

      NH3

  • 3. 
    All combustion reactions are  ........Reactions?
    • A. 

      Endothermic

    • B. 

      Exothermic

    • C. 

      Photo Chemical

    • D. 

      Rearrangment

  • 4. 
    The anode at is electrode at which ........process occurs?
    • A. 

      Oxidation

    • B. 

      Reduction

    • C. 

      Self Redox Reaction

    • D. 

      None of these

  • 5. 
    For a gas obeying boyles law ,if pressure is doubled than volume become ?
    • A. 

      Half

    • B. 

      Double

    • C. 

      4 time increase

    • D. 

      8 time increase

  • 6. 
    Which molecule has zero dipole movement?
    • A. 

      NH​​​​​​​​​​3

    • B. 

      SO​​​​​2

    • C. 

      H​​​​​​2​​​​​O

    • D. 

      CO​​​​​2

  • 7. 
    The percent composition of an unknown element X in CH3X is 32%.which of the following is element X?
    • A. 

      H

    • B. 

      F

    • C. 

      Na

    • D. 

      Cl

    • E. 

      Li

  • 8. 
    How much NaOH must be added to make 200mL of a 1M NaOH solution?
    • A. 

      80

    • B. 

      40

    • C. 

      16

    • D. 

      8

  • 9. 
    A process involving no Heat exchange is known as?
    • A. 

      Isothermal process

    • B. 

      Adiabatic process

    • C. 

      Isometric process

    • D. 

      Isobaric process

  • 10. 
    Which of the following is Formula for a noncyclic saturated hydrocarbon?
    • A. 

      C7H12

    • B. 

      C7H18

    • C. 

      C​​​​​​7​​​​​H​​​​14

    • D. 

      C​​​​​​7​​​​​H​​​​16

  • 11. 
    When electron jumps from n=6 to n=2 then belongs to ......series?
    • A. 

      Layman Series

    • B. 

      Balmar Series

    • C. 

      Bracket Series

    • D. 

      Pfund Series

  • 12. 
    The oxidation state of Fe in K4[Fe(CN)6?
    • A. 

      +3

    • B. 

      +4

    • C. 

      0

    • D. 

      +2

    • E. 

      -2

  • 13. 
    The colour of  phenolphthane in Basic medium ?
    • A. 

      Red

    • B. 

      Yellow

    • C. 

      Blue

    • D. 

      Pink

    • E. 

      Colourless

  • 14. 
    How many pi Bond are present in N​​​​​​2?
    • A. 

      2

    • B. 

      3

    • C. 

      No Pi bond

    • D. 

      1

  • 15. 
    When  a solution its pH is 3.2 then what will be its PoH .?
    • A. 

      5.8

    • B. 

      6.8

    • C. 

      9.8

    • D. 

      10.8

    • E. 

      Same

  • 16. 
    The Geometry Of NH3 is?
    • A. 

      Planner Trigonal

    • B. 

      Trigonal pyramidal

    • C. 

      Tetrahydral

    • D. 

      Bent angular

  • 17. 
    Balmer series Contain .......region of Light?
    • A. 

      Visible

    • B. 

      Ultraviolet

    • C. 

      Infrared

    • D. 

      For infrared 

  • 18. 
    Rectified sprit contain how many percentage  of Alcohol?
    • A. 

      4%

    • B. 

      11%

    • C. 

      85%

    • D. 

      90%

    • E. 

      99.99%

  • 19. 
    Removal of Hydrogen and Water this reaction known as?
    • A. 

      Hydrogenation

    • B. 

      Halogenation

    • C. 

      Both

    • D. 

      Hydrohalogenation

    • E. 

      All

  • 20. 
    Which of the following is Not   Isotope of Hydrogen  ?
    • A. 

      Dueterium

    • B. 

      Protium 

    • C. 

      Uranium

    • D. 

      Tritium

    • E. 

      C&D both

  • 21. 
    Coke is produced from bitumeious coal by
    • A. 

      Cracking

    • B. 

      Synthesis

    • C. 

      Substitution

    • D. 

      Destructive Destillation

    • E. 

      Filteration

  • 22. 
    Heating  phenol with Zn will yeilds?
    • A. 

      Benzen

    • B. 

      Benzoic Acid

    • C. 

      Phenoxide acid

    • D. 

      Chloro ethane

    • E. 

      Cyclohexane

  • 23. 
    Formaldehyde +Ethyle Alcohol ..........product will Form?
    • A. 

      Oxime

    • B. 

      Formic acid

    • C. 

      Ethonic acid

    • D. 

      .Hemiacetal

    • E. 

      NONE

  • 24. 
    Which of the following  factors has no effect on Boiling Point?
    • A. 

      Pressure

    • B. 

      Intermolecular forces

    • C. 

      Amount of liquid

    • D. 

      Impurties

    • E. 

      None

  • 25. 
    Yeast Can be used to convert simple sugar to .......?
    • A. 

      Ethonoic acid +O2

    • B. 

      Ethyle Alcohol +CO2

    • C. 

      Ethanol +O2

    • D. 

      Starch +Carbohydrate

    • E. 

      Starch  +O2

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