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GATE 2017-2018 :: GATE Chemistry

  1. Identify the product from the following reaction

    (9-BBN = 9-Borabicyclo[3¢3¢1]nonane)
  2. A.
    .

    B.
    .

    C.
    .

    D.
    .

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  3. The acid catalyzed cyclization of 5-ketodecan-1,9-diol is given below
     
    The most predominant spiroketal is
  4. A.
    .

    B.
    .

    C.
    .

    D.
    .

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  5. For a face centered cubic lattice, the Miller indices for the first Bragg's peak (smallest Bragg angle) are
  6. A.
    0 0 2
    B.
    1 1 1
    C.
    0 0 1
    D.
    1 1 0

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  7. In the reaction

    the product formed is
  8. A.
    .

    B.
    .

    C.
    .

    D.
    .

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  9. Consider the following pairs of complexes 
    [CoF(NH3)5]2+ and [Cr(OH2)6]2+ 
    [Co(NH3)5 (OH2)]3+ and [Cr(OH2)6]2+ 
    [Co(NH3)6]3+ and [Cr(OH2)6]2+ 
    [CoI(NH3)5]2+ and [Cr(OH2)6]2+ 
    The electron transfer rate will be fastest in the pair
  10. A.
    [CoF(NH3)5]2+ and [Cr(OH2)6]2+
    B.
    [Co(NH3)5 (OH2)]3+ and [Cr(OH2)6]2+
    C.
    [Co(NH3)6]3+ and [Cr(OH2)6]2+
    D.
    [CoI(NH3)5]2+ and [Cr(OH2)6]2+

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  11. Hemoglobin is an oxygen carrying protein. The correct statement about oxy-hemoglobin is that
  12. A.
    the metal is low-spin in +3 oxidation state while dioxygen is in O2 ─ form
    B.
    the metal is high-spin in +3 oxidation state while dioxygen is in OO2 ─ form
    C.
    the metal is low-spin in +3 oxidation state while dioxygen is in neutral form
    D.
    the metal is high-spin in +3 oxidation state while dioxygen is in neutral form

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  13. If a mixture of NaCl, conc. H2SO4 and K2Cr2O7 is heated in a dry test tube, a red vapour (P) is formed. This vapour (P) dissolves in aqueous NaOH to form a yellow solution, which upon treatment with AgNO3 forms a red solid (Q). P and Q are, respectively
  14. A.
    CrO2Cl2 and Ag2Cr2O7
    B.
    Na2[CrOCl5] and Ag2CrO4
    C.
    Na2[CrOCl5] and Ag2Cr2O7
    D.
    CrO2Cl2 and Ag2CrO4

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  15. For the following reaction 
    2MnO4─ + 5H2C2O4 + 6H+ → 2Mn2+ + 8H2O + 10CO2 
    Eo(MnO4─/Mn2+) = +1.51 V and Eo(CO2/H2C2O4) = ─ 0.49 V. 
    At 298 K, the equilibrium constant is
  16. A.
    10500
    B.
    10338
    C.
    1038
    D.
    10833

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  17. The ground states of high-spin octahedral and tetrahedral Co(II) complexes are, respectively
  18. A.
    4T2g and 4A2
    B.
    4T1g and 4A2
    C.
    3T1g and 4A2
    D.
    4T1g and 3T1

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  19. The INCORRECT statement about Zeise's salt is
  20. A.
    Zeise's salt is diamagnetic
    B.
    The oxidation state of Pt in Zeise's salt is +2
    C.
    All the Pt─Cl bond lengths in Zeise's salt are equal
    D.
    C─C bond length of ethylene moiety in Zeise's salt is longer than that of free ethylene molecule

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