AIIMS MBBS 2019 Question Paper with Answer Key PDF (May 26 - Forenoon Session)

AIIMS MBBS Questions

• 1.

  Elemental silicon to be used as a semiconductor is purified by

  • heating under vacuum
  • floatation
  • zone refining
  • electrolysis
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• 2.

  The neutralization of \(NaOH\) by \(H _{2} SO _{4}\) takes place as follows \(H _{2} SO _{4}+2 NaOH \longrightarrow Na _{2} SO _{4}+ H _{2} O\) 

  For complete neutralization Equivalents of acid = equivalents of base Equivalents of \(NaOH =\) moles \(\times\) acidity \(=1 \times 1=1\) Equivalents of \(H _{2} SO _{4}=\frac{x}{98} \times 2=\frac{x}{49}\) (Mol. mass of \(H _{2} SO _{4}=98\) ) Putting the values \(1 \times 1 =\frac{x}{49}\) \(\Rightarrow x =49\, g\) but \(H _{2} SO _{4}\) is \(70 \%\) let \(y g 70 \% H _{2} SO _{4}\) is required \(\frac{70}{100} \times y =49\) \(\Rightarrow y =70\, g\)

  • 10 min
  • 12 min
  • 20 min
  • 15 min
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• 3.

  All vertebrates are chordates but all chordates are not vertebrates, why ?

  • Notochord is replaced by vertebral column in adult of some chordates
  • Ventral hollow nerve cord remains throughout life in some chordates
  • All chordates possess vertebral column
  • All chordates possess notochord throughout their life
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• 4.

  Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is:

  • drift velocity
  • electric field
  • current density
  • current
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• 5.

  In a u-tube as shown in figure, water and oil are in the left side and right side of the tube respectively. The heights from the bottom for water and oil columns are 15 cm and 20 cm respectively. The density of the oil is :- [take $\rho_{water}$ = 1000 kg/m$^3$]

  • 1200 kg/m$^3$
  • 750 kg/m$^3$
  • 1000 kg/m$^3$
  • 1333 kg/m$^3$
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• 6.

  A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4 \times 10^{-3}$ Wb. The self-inductance of the solenoid is

  • 1.0 henry
  • 4.0 henry
  • 2.5 henry
  • 2.0 henry
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