DUET 2021 DU MA in Life Long Learning N Extension Question Paper with Answer Key PDFs (September 28 - Shift 3)

DUET Questions

• 1.

  Which of the following graphs shows the variation of acceleration due to gravity $g$ with depth $h$ from the surface of the earth?

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• 2.

  How many $ 1\,\mu F $ capacitors must be connected in parallel to store a charge of $1\, C$ with a potential of $110\, V$ across the capacitors?

  • 990
  • 900
  • 9090
  • 909
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• 3.

  Most stable carbocation is

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• 4.

  A hammer of mass $200\, kg$ strikes a steel block of mass $200\, g$ with a velocity $8\, ms^{-1}$. If $23\%$ of the energy is utilized to heat the steel block, the rise in temperature of the block is (specific heat capacity of steel = $460 \; J \; kg^{-1} \; K^{-1}$)

  • 8 K
  • 16 K
  • 12 K
  • 24 K
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• 5.

  Which of the following statements is wrong?

  • Pollen grains remain viable for several months because their outer covering is made of sporopollenin
  • No enzyme can degrade sporopollenin
  • Pollen grains are well represented in fossil strata due to sporopollenin
  • Pollen wall has cavities containing proteins
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• 6.

  Taxonomic hierarchy refers to

  • stepwise arrangement of all tegories for classification of plants and animal
  • a group of senior taxonomists who decide the nomenclature of plants and animals
  • a list of botanists or zoologists who have worked on taxonomy of a species or group
  • classification of a species based on fossil record
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