Pre Bridge Course Quiz

50 Questions | Total Attempts: 478

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Pre Bridge Course Quiz

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Questions and Answers
  • 1. 
    What is x, if A= is singular matrix?
    • A. 

      5

    • B. 

      6

    • C. 

      7

    • D. 

      8

  • 2. 
    Two matrices A and B are multiplied to get AB if
    • A. 

      Both are rectangular

    • B. 

      Both have same order

    • C. 

      No of columns of A is equal to rows of B

    • D. 

      No of rows of A is equal to no of columns of B

  • 3. 
    If A=, what will be the Matrix B after applying the transformations  on Matrix A.A .B. C. D.
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 4. 
    If X =  , Y= then XY=?A.B.C.D. 
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 5. 
    A proton has approximately the same mass as
    • A. 

      A neutron

    • B. 

      An alpha particle

    • C. 

      A beta particle

    • D. 

      An electron

  • 6. 
     Which compound forms a colored aqueous solution?a) CaCl2b) CrCl3c) NaOHd) KBr
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 7. 
    Which of the following elements has the smallest atomic radius? 
    • A. 

      Nickel

    • B. 

      Cobalt

    • C. 

      Calcium

    • D. 

      Potassium

  • 8. 
    Which halogens are gases at STP?
    • A. 

      Chlorine and fluorine

    • B. 

      Chlorine and bromine

    • C. 

      Iodine and fluorine

    • D. 

      Iodine and bromine

  • 9. 
    Natural rubber is a polymer of 
    • A. 

      Ethylene

    • B. 

      Vinyl Chloride

    • C. 

      Phenol

    • D. 

      Isoprene

  • 10. 
    At STP, which substance is the best conductor of electricity?
    • A. 

      Nitrogen

    • B. 

      Neon

    • C. 

      Sulfur

    • D. 

      Silver

  • 11. 
    Which formula represents a salt? a) KOHb) KClc) CH3OHd) CH3COOH
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 12. 
    Which substance can be classified as an Arrhenius acid?
    • A. 

      HCL

    • B. 

      NaCl

    • C. 

      LiOH

    • D. 

      KOH

  • 13. 
    Which solution will change red litmus to blue?a) HCl(aq)b) NaCl(aq)c) CH3OH(aq)d) NaOH(aq)
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 14. 
    An acidic solution could have a pH of
    • A. 

      7

    • B. 

      10

    • C. 

      3

    • D. 

      14

  • 15. 
    Nylon-66 is made by using-
    • A. 

      Phenol

    • B. 

      Benzaldehyde

    • C. 

      Adipic acid

    • D. 

      Succinic Acid

  • 16. 
    Halo form is represented asa) CH3Xb) CH2X2c) CHX3d)CX4 
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 17. 
    SN2 mechanism proceeds through the intervention of -
    • A. 

      Carbonium ion

    • B. 

      Transition state

    • C. 

      Free radical

    • D. 

      Carbanion

  • 18. 
    Optical activity in a compound is detected and measured by --
    • A. 

      Calorimeter

    • B. 

      Polarimeter

    • C. 

      Colorimeter

    • D. 

      Spectrometer

  • 19. 
    Chloroform is used as a/an ----
    • A. 

      Fire extinguisher

    • B. 

      Industrial solvent

    • C. 

      Antiseptic

    • D. 

      Insecticide

  • 20. 
    X-rays are 
    • A. 

      Ultrasonic waves of high wavelength

    • B. 

      Mechanical waves

    • C. 

      Electromagnetic waves

    • D. 

      All the above are false.

  • 21. 
    The wavelength of X-rays is approximately a) 1A0     b) 100 A0      c) 200 A0            d) 1000 A0 
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 22. 
    Basic source of magnetism ____.
    • A. 

      Charged particles alone

    • B. 

      Movement of charged particles

    • C. 

      Magnetic dipoles

    • D. 

      Magnetic domains

  • 23. 
    Magnetic lines of force re originated from ------ pole.
    • A. 

      North

    • B. 

      South

    • C. 

      Both a) & b)

    • D. 

      None of this

  • 24. 
    All the magnetic materials loose their magnetic properties when
    • A. 

      Dipped in water

    • B. 

      Dipped in oil

    • C. 

      Braught near the piece of iron

    • D. 

      Strongly heated

  • 25. 
    An increase of temperature of a semicon-ductor decreases 
    • A. 

      The resistivity

    • B. 

      The band gap

    • C. 

      The conductivity

    • D. 

      Size of the semiconductor.

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