DUET 2019 MSc Chemistry Previous Queston Papers

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7/7/2019

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1. Specific Redox reaction of chlorine is known as [Question ID = 1959]
   1. reduction [Option ID = 7836]
   2. redox chlorination [Option ID = 7835]
   3. disproportionation [Option ID = 7834]
   4. oxidation [Option ID = 7833]

   Correct Answer: oxidation [Option ID = 7833]

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2. Which of the following is not a standard condition? [Question ID = 1906]
   1. 1 mol dm³ solutions [Option ID = 7624]
   2. 100 atm [Option ID = 7622]
   3. 100 kPa [Option ID = 7621]
   4. 298 K [Option ID = 7623]

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   Correct Answer: 100 kPa [Option ID = 7621]

3. Which transitions are studied by UV spectrophotometer? [Question ID = 1955]
   1. Rotational [Option ID = 7818]
   2. Electronic [Option ID = 7817]
   3. Vibrational [Option ID = 7819]

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   4. Nuclear [Option ID = 7820]

   Correct Answer: Electronic [Option ID = 7817]

4. Which electrode/s may be used to determine the pH of a solution? [Question ID = 1897]
   1. Quinhydrone electrode [Option ID = 7587]
   2. Hydrogen electrode [Option ID = 7586]

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   3. All of the above [Option ID = 7588]
   4. Glass electrode [Option ID = 7585]

   Correct Answer: Glass electrode [Option ID = 7585]

5. Which acid is present in lemon? [Question ID = 1949]
   1. lactic acid [Option ID = 7794]

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   2. tartaric acid [Option ID = 7796]
   3. citric acid [Option ID = 7795]
   4. malic acid [Option ID = 7793]

   Correct Answer: malic acid [Option ID = 7793]

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6. Gram molecular volume of oxygen at STP is [Question ID = 1964]
   1. 11200 cm³ [Option ID = 7853]
   2. 22400 cm³ [Option ID = 7856]
   3. 5600 cm³ [Option ID = 7855]
   4. 3200 cm³ [Option ID = 7854]

   Correct Answer: 22400 cm³ [Option ID = 7856]

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7. Glucose does not react with: [Question ID = 1921]
   1. HCN [Option ID = 7683]
   2. NaHSO3 [Option ID = 7684]
   3. C6H5NHNH2 [Option ID = 7681]
   4. H2N-OH [Option ID = 7682]

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   Correct Answer: NaHSO3 [Option ID = 7684]

8. Which does not increase rate by affecting the number or nature of collisions? [Question ID = 1905]
   1. adding a catalyst [Option ID = 7619]
   2. increasing the surface area [Option ID = 7617]
   3. increasing the pressure [Option ID = 7618]

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   4. increasing the temperature [Option ID = 7620]

   Correct Answer: adding a catalyst [Option ID = 7619]

9. If AgI crystallizes in zinc blende structure with 12 ions at lattice points, what fraction of tetrahedral voids is occupied by Ag+ ions? [Question ID = 1968]
   1. 75% [Option ID = 7870]
   2. 25% [Option ID = 7872]

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   3. 50% [Option ID = 7871]
   4. 100% [Option ID = 7869]

   Correct Answer: 50% [Option ID = 7871]

10. Which carbonyl compound has maximum dipole moment? [Question ID = 1920]

    1. FirstRanker.com

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    2. Identify the wrong statement in the following [Question ID = 1951]
       1. Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the periodic table [Option ID = 7803]
       2. Atomic radius of the elements increases as one moves down the first group of the periodic table [Option ID = 7802]
       3. Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius [Option ID = 7804]
       4. Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius [Option ID = 7801]

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       Correct Answer: Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius [Option ID = 7801]

    3. The structure of sulphur dioxide molecule (SO2) may be given as [Question ID = 1956]
       1. Linear [Option ID = 7824]
       2. Bent [Option ID = 7823]
       3. Octahedral [Option ID = 7822]

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       4. Tetrahedral [Option ID = 7821]

       Correct Answer: Bent [Option ID = 7823]

    4. The structure of the compound that matches the 1H NMR data given below: 1H NMR (DMSO-d6): 8 7.75 (dd, J = 8.8, 2.4 Hz, 1H), 7.58 (d, J = 2.4 3.80 (s, 3H) [Question ID = 1924]

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