COMEDK UGET 2017 Question Paper(Available): Download Solution PDF with Answer Key PDF

COMEDK UGET Questions

• 1.

  An inorganic compound W undergoes the following reactions: $ W + \text{Na}_2\text{CO}_3 \xrightarrow{\text{O}_2 / \text{heat}} X + H^+ \xrightarrow{} Y(s) $ $ Y(aq) + \text{KCl} (aq) \xrightarrow{} Z(s) $ Z appears in the form of orange crystals and is used as an oxidising agent in acid medium. Identify the compound W.

  • \(\text{K}_2\text{Cr}_2\text{O}_4\)
  • \(\text{FeCr}_2\text{O}_4\)
  • \(\text{Cu}(\text{Cr}_2\text{O}_4)_2\)
  • \(\text{Na}_2\text{Cr}_2\text{O}_7\)
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• 2.

  Two statements, Assertion and Reason are given. Choose the correct option from the following.
  Assertion: In the secondary structure of RNA, double helix structure is formed.
  Reason: In the double structure of RNA, two nucleic acid chains are wound about each other and held together by hydrogen bonds between pairs of bases.
  

  • ssertion is correct but Reason is incorrect.
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  • Assertion is incorrect but Reason is correct.
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
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• 3.

  200 ml of an aqueous solution contains 3.6 g of Glucose and 1.2 g of Urea maintained at a temperature equal to 27$^{\circ}$C. What is the Osmotic pressure of the solution in atmosphere units?
  Given Data R = 0.082 L atm K$^{-1}$ mol$^{-1}$
  Molecular Formula: Glucose = C$_6$H$_{12}$O$_6$, Urea = NH$_2$CONH$_2$

  • 6.24
  • 1.56
  • 9.84
  • 4.92
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• 4.

  Five charges, 'q' each are placed at the corners of a regular pentagon of side 'a' as shown in figure. First, charge from 'A' is removed with other charges intact, then charge at 'A' is replaced with an equal opposite charge. The ratio of magnitudes of electric fields at O, without charge at A and that with equal and opposite charge at A is
  

  • 4 : 1
  • 2 : 1
  • 1 : 4
  • 1 : 2
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• 5.

  At 700 K, the Equilibrium constant value for the formation of HI from $ H_2 $ and $ I_2 $ is 49.0. 0.7 mole of HI(g) is present at equilibrium. What will be the concentrations of $ H_2 $ and $ I_2 $ gases if we initially started with HI(g) and allowed the reaction to reach equilibrium at the same temperature?

  • 0.1195
  • 0.3442
  • 0.4692
  • 0.521
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• 6.

  When an A.C. source is connected to a inductive circuit,

  • voltage and current are in same phase.
  • voltage is ahead of current in phase.
  • the phase between voltage and current depends upon the value of inductance.
  • voltage lags behind current in phase.
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