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GATE 2017-2018 :: GATE Chemistry

  1. The angular part of the wavefunction for the electron in a hydrogen atom is proportional to sin2θ cos θ e2iØ . The values of the azimuthal quantum number (l) and the magnetic quantum number (m) are, respectively
  2. A.
    2 and 2
    B.
    2 and "“2
    C.
    3 and 2
    D.
    3 and -2

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  3. T he bond that gives the most intense band in the infrared spectrum for its stretching vibration is
  4. A.
    C─H
    B.
    N─H
    C.
    O─H
    D.
    S─H

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  5. I f xA and xB are the respective mole fractions of A and B in an ideal solution of the two and TA, TB, T are the fusion temperatures of pure A, pure B and the ideal solution respectively, then
  6. A.
    .

    B.
    .

    C.
    .

    D.
    .

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  7. F or a reaction involving two steps given below

    assume that the first step attains equilibrium rapidly. The rate of formation of P is proportional to
  8. A.
    [G
    B.
    [G
    C.
    [G
    D.
    [G

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  9. A metal chelate that can be used for separation and quantitative analysis of aluminium ions by gas chromatography is
  10. A.
    EDTA
    B.
    ethylene glycol
    C.
    dinonyl phthalate
    D.
    trifluoroacetylacetone

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  11. The enthalpies of hydration of Ca2+, Mn2+ and Zn2+ follow the order
  12. A.
    Mn2+ > Ca2+ > Zn2+
    B.
    Zn2+ > Ca2+ > Mn2+
    C.
    Mn2+ > Zn2+ > Ca2+
    D.
    Zn2+ > Mn2+ > Ca2+

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  13. The number of terminal carbonyl groups present in Fe2(CO)9 is
  14. A.
    2
    B.
    5
    C.
    6
    D.
    3

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  15. Among the following substituted silanes, the one that gives cross-linked silicone polymer upon hydrolysis is
  16. A.
    (CH3)4Si
    B.
    CH3SiCl3
    C.
    (CH3)2SiCl2
    D.
    (CH3)3SiCl

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  17. The plot of χT versus T ((where χ is molar magnetic susceptibility and T is the temperature) for a paramagnetic complex which strictly follows Curie equation is
  18. A.
    .

    B.
    .

    C.
    .

    D.
    .

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  19. A mong the following donors, the one that forms most stable adduct with the Lewis acid B(CH3)3 is
  20. A.
    4-methylpyridine
    B.
    2,6-dimethylpyridine
    C.
    4-nitropyridine
    D.
    2,6-di-tert-butylpyridine

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