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Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key

This post was last modified on 27 December 2020

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DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA


Topic: - CHEM MSC S2

  1. The oxo-acid of phosphorus having P-atoms in +4, +3, and + 4 oxidation states respectively, is [Question ID = 9737]
    1. H5P3O10 [Option ID = 38942]
    2. H5P3O7 [Option ID = 38944]

      3. --- Content provided by‍ FirstRanker.com ---

    3. H5P3O8 [Option ID = 38946]
    4. H5P3O9 [Option ID = 38948]

    Correct Answer :-

    • H5P3O8 [Option ID = 38946]

    2. --- Content provided by‌ FirstRanker.com ---

  2. According to Wade's theory the anion [B12H12]2- adopts [Question ID = 9740]
    1. closo-structure [Option ID = 38951]
    2. arachno-structure [Option ID = 38953]
    3. hypo- structure [Option ID = 38955]
    4. nido- structure [Option ID = 38957]

    Correct Answer :-

    --- Content provided by⁠ FirstRanker.com ---

    • closo-structure [Option ID = 38951]

  3. Which one of the following species has the magnetic moment value of 3.87 BM? [Question ID = 9741]
    1. Fe3+ [Option ID = 38958]
    2. Cr2+ [Option ID = 38960]
    3. Co2+ [Option ID = 38962]

      4. --- Content provided by FirstRanker.com ---

    4. Au³+ [Option ID = 38964]

    Correct Answer :-

    • Co2+ [Option ID = 38962]

  4. Which of the following complexes does not show optical activity? [Question ID = 9743]
    1. [Co(EDTA)] [Option ID = 38966]

      2. --- Content provided by​ FirstRanker.com ---

    2. [Pt(bn)2]2+ [Option ID = 38968]
    3. [Pt(pn)2]2+ [Option ID = 38970]
    4. [Pt(en)2]2+ [Option ID = 38972]

    Correct Answer :-

    • [Pt(en)2]2+ [Option ID = 38972]

    --- Content provided by‌ FirstRanker.com ---

  5. The expected H-H-H bond angle in [H3]+ [Question ID = 9745]
    1. 180° [Option ID = 38974]
    2. 120° [Option ID = 38976]
    3. 60° [Option ID = 38978]
    4. 90° [Option ID = 38980]

      5. --- Content provided by FirstRanker.com ---

    Correct Answer :-

    • 60° [Option ID = 38978]

  6. The metallic radii are abnormally high for which of the following pairs? [Question ID = 9747]
    1. Eu, Yb [Option ID = 38982]
    2. Sm, Tm [Option ID = 38984]

      3. --- Content provided by‍ FirstRanker.com ---

    3. Gd, Lu [Option ID = 38986]
    4. Nd, Ho [Option ID = 38988]

    Correct Answer :-

    • Eu, Yb [Option ID = 38982]

    7. --- Content provided by FirstRanker.com ---

  7. The least basic among the following is [Question ID = 9750]
    1. Al(OH)3 [Option ID = 38991]
    2. La(OH)3 [Option ID = 38993]
    3. Ce(OH)3 [Option ID = 38995]
    4. Lu(OH)3 [Option ID = 38997]

    8. --- Content provided by⁠ FirstRanker.com ---

  8. According to VSEPR theory, the molecule is [Question ID = 9751]
    1. SO42- [Option ID = 38998]
    2. SF4 [Option ID = 39000]
    3. S2Cl2 [Option ID = 39003]
    4. SO2Cl2 [Option ID = 39005]

    Correct Answer :-

    --- Content provided by​ FirstRanker.com ---

    • SO42- [Option ID = 38998]

  9. According to MO theory, for the diatomic species, C2 [Question ID = 9754]
    1. Bond order is zero and it is diamagnetic [Option ID = 39007]
    2. Bond order is two and it is paramagnetic [Option ID = 39009]
    3. Bond order is two and it is diamagnetic [Option ID = 39011]

      4. --- Content provided by‍ FirstRanker.com ---

    4. Bond order is zero and it is paramagnetic [Option ID = 39013]

    Correct Answer :-

    • Bond order is two and it is diamagnetic [Option ID = 39011]

  10. The number of microstates present in 3F term is [Question ID = 9755]
    1. 3 [Option ID = 39014]

      2. --- Content provided by FirstRanker.com ---

    2. 21 [Option ID = 39016]
    3. 9 [Option ID = 39018]
    4. 28 [Option ID = 39020]

    Correct Answer :-

    • 21 [Option ID = 39016]

    --- Content provided by‍ FirstRanker.com ---

  11. Consider the following statements:

    According the Werner's theory

    A. Ligands are connected to the metal ions by covalent bonds

    B. Secondary valence is have directional properties

    C. Secondary valences are non-ionisable of these statements

    --- Content provided by FirstRanker.com ---

    Choose the correct answer from the options given below:

    [Question ID = 9757]
    1. A, B and C only [Option ID = 39022]
    2. B and C only [Option ID = 39024]
    3. A and C only [Option ID = 39026]
    4. A and B only [Option ID = 39028]

      5. --- Content provided by‍ FirstRanker.com ---

    Correct Answer :-

    • B and C only [Option ID = 39024]

  12. Among the following, the correct order of acidity is? [Question ID = 9760]
    1. HCIO < HCIO2 < HCIO3 < HCLO4 [Option ID = 39031]
    2. HCIO4 < HCIO3 < HCIO2 < HCIO [Option ID = 39033]

      3. --- Content provided by‍ FirstRanker.com ---

    3. HCIO < HCIO4 < HCIO3 < HCIO2 [Option ID = 39035]
    4. HCIO2 < HCIO2 < HCIO < HCLO4 [Option ID = 39036]

    Correct Answer :-

    • HCIO < HCIO2 < HCIO3 < HCIO4

    13. --- Content provided by​ FirstRanker.com ---

  13. Which of the following nonaqueous solvents has the longest liquid range? [Question ID = 9761]
    1. H2SO4 [Option ID = 39038]
    2. N2O4 [Option ID = 39040]
    3. NH3 [Option ID = 39042]
    4. HCl [Option ID = 39044]

    Correct Answer :-

    --- Content provided by⁠ FirstRanker.com ---

    • H2SO4 [Option ID = 39038]

  14. The following compounds are Pd (C6H5)2(SCN)2] and [Pd (C6H5)2(NCS)2] [Question ID = 9764]
    1. Linkage isomers [Option ID = 39046]
    2. Co-ordination isomers [Option ID = 39047]
    3. Ionization isomers [Option ID = 39049]

      4. --- Content provided by⁠ FirstRanker.com ---

    4. Geometrical isomers [Option ID = 39051]

    Correct Answer :-

    • Linkage isomers [Option ID = 39046]

  15. Which of the following elements found in native state [Question ID = 9765]
    1. Al [Option ID = 39054]

      2. --- Content provided by‌ FirstRanker.com ---

    2. Au [Option ID = 39055]
    3. Cu [Option ID = 39056]
    4. Na [Option ID = 39058]

    Correct Answer :-

    • Au [Option ID = 39055]

    --- Content provided by‍ FirstRanker.com ---

  16. Element with outer electronic configuration ns2 np6 are [Question ID = 9768]
    1. Alkaline earth metals [Option ID = 39063]
    2. Transition elements [Option ID = 39065]
    3. Chalcogens [Option ID = 39067]
    4. Noble gases [Option ID = 39069]

      5. --- Content provided by​ FirstRanker.com ---

    Correct Answer :-

    • Noble gases [Option ID = 39069]

  17. Which one of the following elements is least likely to participate in a hydrogen bond? [Question ID = 9769]
    1. O [Option ID = 39070]
    2. S [Option ID = 39073]

      3. --- Content provided by‌ FirstRanker.com ---

    3. F [Option ID = 39075]
    4. N [Option ID = 39077]

    Correct Answer :-

    • S [Option ID = 39073]

    18. --- Content provided by‍ FirstRanker.com ---

  18. Which one of the following terms describes a positive and negative charge, which are separated in space within a molecule? [Question ID = 9771]
    1. Salt bridge [Option ID = 39078]
    2. Polar bond [Option ID = 39080]
    3. Dipole [Option ID = 39082]
    4. Van der Waals interaction [Option ID = 39084]

    Correct Answer :-

    --- Content provided by​ FirstRanker.com ---

    • Dipole [Option ID = 39082]

  19. Choose the correct lattice energy order [Question ID = 9773]
    1. LiH < NaH < KH [Option ID = 39086]
    2. MgH2 > CaH2 < SrH2 [Option ID = 39088]
    3. MgH2 > CaH2 > SrH2 [Option ID = 39090]

      4. --- Content provided by‍ FirstRanker.com ---

    4. LiH< NaH > KH
  20. XeF2 is isostructural with [Question ID = 9775]
    1. ICl2 [Option ID = 39094]
    2. SbCl3 [Option ID = 39096]
    3. BaCl2 [Option ID = 39099]

      4. --- Content provided by‌ FirstRanker.com ---

    4. TeF2 [Option ID = 39101]

    Correct Answer :-

    • ICl2 [Option ID = 39094]

  21. The pair of species that has the same bond order in the following is [Question ID = 9778]
    1. O2, B2 [Option ID = 39103]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. CO, NO+ [Option ID = 39105]
    3. O2, N2 [Option ID = 39107]
    4. NO, CN [Option ID = 39109]

    Correct Answer :-

    • CO, NO+ [Option ID = 39105]

    --- Content provided by‍ FirstRanker.com ---

  22. Total orbital angular momentum of np' electronic system is (a.u.) [Question ID = 9779]
    1. 0 [Option ID = 39110]
    2. 1 [Option ID = 39112]
    3. 2 [Option ID = 39113]
    4. 1/2 [Option ID = 39115]

      5. --- Content provided by FirstRanker.com ---

    Correct Answer :-

    • 1 [Option ID = 39112]

  23. The process of heating the concentrated ore in a limited supply of air or in the absence of air is known as [Question ID = 9782]
    1. Roasting [Option ID = 39119]
    2. Leaching [Option ID = 39120]

      3. --- Content provided by⁠ FirstRanker.com ---

    3. Calcination [Option ID = 39122]
    4. Cupellation [Option ID = 39124]

    Correct Answer :-

    • Calcination [Option ID = 39122]

    24. --- Content provided by FirstRanker.com ---

  24. Bond order of He molecule is [Question ID = 9783]
    1. 2 [Option ID = 39126]
    2. 1/2 [Option ID = 39128]
    3. 1 [Option ID = 39130]
    4. 0 [Option ID = 39132]

    Correct Answer :-

    --- Content provided by‍ FirstRanker.com ---

    • 0 [Option ID = 39132]

  25. Which of the following structures represents the conjugate acid of H?42- [Question ID = 9786]
    1. H2PO4 [Option ID = 39135]
    2. H3PO4 [Option ID = 39137]
    3. H4PO4+ [Option ID = 39139]

      4. --- Content provided by‌ FirstRanker.com ---

    4. PO43 [Option ID = 39141]

    Correct Answer :-

    • H2PO4 [Option ID = 39135]

  26. (NH4)2Cr2O7 On heating gives a gas which is also given by [Question ID = 9787]
    1. heating NH4NO2 [Option ID = 39142]

      2. --- Content provided by‍ FirstRanker.com ---

    2. heating NII4NO3 [Option ID 39144]
    3. Mg3N2 + H2O [Option ID = 39146]
    4. Na (comp.) + H2O2 [Option ID = 39148]
  27. All metals form oxides of the type MO except [Question ID = 9790]
    1. Copper [Option ID = 39151]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. Barium [Option ID = 39153]
    3. Silver [Option ID = 39155]
    4. Lead [Option ID = 39157]

    Correct Answer :-

    • Silver [Option ID = 39155]

    --- Content provided by FirstRanker.com ---

  28. Which of the following represents the order of the extent of intensity of scattering of X-rays from the ions Na+, Li+, Cl-, Br: [Question ID = 9791]
    1. Li+ < Na+ < Cl- < Br- [Option ID = 39158]
    2. Br < Cl- < Na+ < Li+ [Option ID = 39160]
    3. Na+ < Li+ < Br < Cl- [Option ID = 39162]
    4. Li+ < Cl < Na+ < Br [Option ID = 39164]

      5. --- Content provided by FirstRanker.com ---

    Correct Answer :-

    • Li+ < Na+ < Cl < Br [Option ID = 39158]

  29. Which ordering correctly shows the variation in rates of water exchange in high-spin aqua complexes [M(OH2)6]n+? [Question ID = 9794]
    1. Cr3+ > Fe3+ [Option ID = 39167]
    2. Cr2+ > Cr3+ [Option ID = 39169]

      3. --- Content provided by‍ FirstRanker.com ---

    3. Co2+ > Cr2+ [Option ID = 39171]
    4. V2+ > Co2+ [Option ID = 39172]

    Correct Answer :-

    • Cr2+ > Cr3+ [Option ID = 39169]

    30. --- Content provided by​ FirstRanker.com ---

  30. Which ordering correctly describes the tendency of a ligand to direct ligand substitution in a square planar complex to a position opposite to itself? [Question ID = 9795]
    1. [CN] > Br > NH3 > [NO2] [Option ID = 39174]
    2. [CN] > [NO2] > Br¯ > NH3 [Option ID = 39176]
    3. Br > [CN] > NH3 > [NO2] [Option ID = 39178]
    4. [NO2] > [CN] > NH3 > Br [Option ID = 39180]

    Correct Answer :-

    --- Content provided by⁠ FirstRanker.com ---

    • [CN] > [NO2] > Br¯ > NH3 [Option ID = 39176]

  31. Identify the wrong statement in the following [Question ID = 9798]
    1. Atomic radius of the elements increases as one moves down the first group of the periodic table [Option ID = 39183]
    2. Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the periodic table [Option ID = 39185]
    3. Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius [Option ID = 39187]

      4. --- Content provided by FirstRanker.com ---

    4. Amongst isoelectronic species, larger the negative charge on the anion, larger is the ionic radius [Option ID = 39189]
  32. Rare gases are [Question ID = 9799]
    1. mono atomic [Option ID = 39190]
    2. di atomic [Option ID = 39191]
    3. tri atomic [Option ID = 39193]

      4. --- Content provided by‌ FirstRanker.com ---

    4. All of these [Option ID = 39196]

    Correct Answer :-

    • mono atomic [Option ID = 39190]

  33. Who proposed first atomic theory? [Question ID = 9801]
    1. E. Rutherford [Option ID = 39198]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. De Broglie [Option ID = 39199]
    3. John Dalton [Option ID = 39200]
    4. D.I. Mendeleev [Option ID = 39201]

    Correct Answer

    • John Dalton [Option ID = 39200]

    --- Content provided by FirstRanker.com ---

  34. Which one of the following is the softest? [Question ID = 9802]
    1. sodium [Option ID = 39202]
    2. iron [Option ID = 39203]
    3. aluminium [Option ID = 39204]
    4. lithium [Option ID = 39205]

      5. --- Content provided by‍ FirstRanker.com ---

    Correct Answer :-

    • sodium [Option ID = 39202]

  35. In a mixture of the five proteins listed below, which should elute second in size-exclusion (gel-filtration) chromatography?

    A. cytochrome c Mr = 13,000

    B. immunoglobulin G Mr = 145,000

    --- Content provided by‌ FirstRanker.com ---

    C. ribonuclease A M1 = 13,700

    D. RNA polymerase Mr = 450,000

    E. serum albumin Mr = 68,500

    Choose the correct answer from the options given below:

    [Question ID = 9803]
    1. A and B only [Option ID = 39206]

      2. --- Content provided by​ FirstRanker.com ---

    2. B only [Option ID = 39207]
    3. C and E only [Option ID = 39208]
    4. A and D only [Option ID = 39209]

    Correct Answer :-

    • B only [Option ID = 39207]

    --- Content provided by‍ FirstRanker.com ---

  36. What is X in the following conversion?

    OH

    H+

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  37. [Question ID = 9804]
    1. [Option ID = 39210]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. [Option ID = 39211]
    3. [Option ID = 39212]
    4. 0 [Option ID = 39213]

    Correct Answer :-

    • [Option ID = 39212]

    --- Content provided by​ FirstRanker.com ---

  38. The correct order of reactivity of p-halo nitrobenzene in the following reaction is

    X

    NO2 NaOMe

    X= F, Cl, Br, I

    MeO

    --- Content provided by​ FirstRanker.com ---

    NO2

    [Question ID = 9805]
    1. p-chloronitrobenzene> p-iodonitrobenzene>p-fluoronitrobenzene>p-bromonitrobenzene [Option ID = 39214]
    2. p-fluoronitrobenzene > p-chloronitrobenzene > p-bromonitrobenzene > p-iodonitrobenzene [Option ID = 39215]
    3. p-iodonitrobenzene > p-bromonitrobenzene > p-chloronitrobenzene > p-fluoronitrobenzene [Option ID = 39216]
    4. p-bromonitrobenzene > p-fluoronitrobenzene > p-iodonitrobenzene > p-chloronitrobenzene [Option ID = 39217]

      5. --- Content provided by⁠ FirstRanker.com ---

    Correct Answer :-

    • p-fluoronitrobenzene > p-chloronitrobenzene > p-bromonitrobenzene > p-iodonitrobenzene [Option ID = 39215]

  39. What is the relationship between the two structures shown?

    CI

    Me

    --- Content provided by​ FirstRanker.com ---

    Me

    CI

    [Question ID = 9806]
    1. Constitutional isomer [Option ID = 39218]
    2. Stereoisomers [Option ID = 39219]
    3. Different drawing of the same conformation of the same compound [Option ID = 39220]

      4. --- Content provided by‌ FirstRanker.com ---

    4. Different conformation of the same compound [Option ID = 39221]

    Correct Answer :-

    • Constitutional isomer [Option ID = 39218]

  40. The number of possible stereoisomer's obtained in the following reaction is

    Me

    --- Content provided by​ FirstRanker.com ---

    1. O3, Zn
    2. excess PhMgBr
    3. H3O+
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  41. [Question ID = 9804]
    1. 4 [Option ID = 39222]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. 6 [Option ID = 39223]
    3. 8 [Option ID = 39224]
    4. 10 [Option ID = 39225]

    Correct Answer :-

    • 8 [Option ID = 39224]

    --- Content provided by FirstRanker.com ---

  42. Identify P for the below mentioned reaction

    1. CH3l

    N(C2H5)2

    P

    2. NaHCO3, MeOH

    --- Content provided by‌ FirstRanker.com ---

    warm

    [Question ID = 9808]
    1. H3C. [Option ID = 39226]

      N(C2H5)2

    2. OCH3 [Option ID = 39227]

      N(C2H5)2

      3. --- Content provided by FirstRanker.com ---

    3. [Option ID = 39228]

      CH2

    4. [Option ID = 39229]

      C2H5

      N

      Me

      --- Content provided by⁠ FirstRanker.com ---

    Correct Answer :-

    CH2

    [Option ID = 39228]

    43. --- Content provided by​ FirstRanker.com ---

  43. The major product M and N formed in the following reactions are

    CH2N2

    N

    CH3I/NaOH

    M

    OH

    --- Content provided by‍ FirstRanker.com ---

    [Question ID = 9809]

    1. Me

      M =

      N

      OH

      N =

      --- Content provided by FirstRanker.com ---

      N

      OCH3

      [Option ID = 39230]

    2. M =

      N

      --- Content provided by⁠ FirstRanker.com ---

      OCH3

      N =

      N

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    3. Me

      --- Content provided by⁠ FirstRanker.com ---

      M =

      N

      N =

      N

      OCH3

      --- Content provided by‌ FirstRanker.com ---

      [Option ID = 39232]

    4. Me

      M =

      N =

      N

      --- Content provided by‍ FirstRanker.com ---

      OH

      [Option ID = 39233]

    Correct Answer :-

    M =

    N =

    --- Content provided by⁠ FirstRanker.com ---

    N

    OCH3

    [Option ID = 39232]

  44. When (R)-cyclohex-2-en-1-ol is treated with acid below gives

    OH

    --- Content provided by⁠ FirstRanker.com ---

    m-CPBA

    [Question ID = 9810]

    1. OH

      [Option ID = 39234]

    2. OH

      [Option ID = 39235]

      3. --- Content provided by​ FirstRanker.com ---

    3. OH

      [Option ID = 39236]
    4. None of these [Option ID = 39237]

    Correct Answer :-

    OH

    --- Content provided by⁠ FirstRanker.com ---

    [Option ID = 39235]

  45. The intermediate formed in the below reaction is

    F

    +

    Br

    --- Content provided by‌ FirstRanker.com ---

    Mg

    THF

    [Question ID = 9811]
    1. Grignard reagent forms dihalobenzene, adds to anthracene with displacement of fluorides anions to forms the product [Option ID = 39238]
    2. Mg reduces anthracene to a reactive dianion that bonds to the dihalobenzene [Option ID = 39239]
    3. A

      --- Content provided by​ FirstRanker.com ---

      This download link is referred from the post: DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

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This post was last modified on 27 December 2020