DUET 2018 B.A. (Honours) Humanities & Social Sciences Question Paper with Answer Key PDF (June 20 - Shift 1)

DUET Questions

• 1.

  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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• 2.

  The basic unit of study in Ecology is

  • population
  • organism
  • community
  • species
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• 3.

  Most stable carbocation is

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• 4.

  Which one of the following alkylbromides undergoes most rapid solvolysis in methanol solution to give corresponding methyl ether?

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• 5.

  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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• 6.

  Which will undergo fastest $82$ substitution reaction when treated with $NaOH$?

  • $H_5C_2 - \underset{\overset{|}{H}}{\overset{\underset{|}{C}H_3}{C}} - Br$
  • $CH_3 - \underset{\overset{|}{C}H_3}{\overset{\underset{|}{C}H_3}{C}} - Br$
  • $H - \underset{\overset{|}{C_2}H_5}{\overset{\underset{|}{C}H_3}{C}} - Br$
  • $H - \underset{\overset{|}{Br}}{\overset{\underset{|}{H}}{C}} - CH_2 - CH_2 - CH_3$
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