DUET 2018 M.A./M.Sc. Mathematics Question Paper with Answer Key PDF (June 19 - Shift 3)

DUET Questions

• 1.

  What is the shape and magnetic nature of permanganate ion ?

  • Pyramidal diamagnetic
  • Tetrahedral, diamagnetic
  • Tetrahedral, paramagnetic
  • Planar, paramagnetic
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• 2.

  In the given structure of a compound, the correct various bond moments direction involving are shown as

  • $ Br\underline{\leftarrow }N\underline{\leftarrow }CH_{2}\underline{\to }SiH_{2}\underline{\leftarrow }CH_{2}\underline{\to }O\underline{\leftarrow }CH_{3} $
  • $ Br\underline{\leftarrow }N\underline{\leftarrow }CH_{2}\underline{\leftarrow }SiH_{2}\underline{\leftarrow }CH_{2}\underline{\to }O\underline{\leftarrow }CH_{3} $
  • $ Br\underline{\leftarrow }N\underline{\to }CH_{2}\underline{\leftarrow }SiH_{2}\to CH_{2}\underline{\to }O\underline{\leftarrow }CH_{3} $
  • $ Br\underline{\leftarrow }N\underline{\to }CH_{2}\underline{\to }SiH_{2}\underline{\leftarrow }CH_{2}\underline{\to }O\underline{\to }CH_{3} $
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• 3.

  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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• 4.

  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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• 5.

  The mobility of charge carriers increases with

  • increase in the average collision time
  • increase in the electric field
  • increase in the mass of the charge carriers
  • decrease in the charge of the mobile carriers
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• 6.

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

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