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Chemistry Test 107
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Chemistry Test 107
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  • Question 1/10
    4 / -1

    When H2S gas is passed in acidic medium which set of cations get precipitated?

  • Question 2/10
    4 / -1

    On heating compound X a gas Y is obtained, which is also manufactured by reaction of Ba(NO3)2 + Zn + KOH(aq.).

  • Question 3/10
    4 / -1

    Calculate % volume occupied by atoms in CsCl type structure assuming ideal crystal having anion-anion contact.

    Solutions

     

  • Question 4/10
    4 / -1

    The ΔH° for the mutarotation of glucose in aqueous solution,

    α – D – glucose (aq) → β – D – glucose (aq)

    has been measured in a microcalorimeter and found to be –1.16 kJ.mol–1. The enthalpies of solution of the two forms of glucose have been determined to be 

    α – D – glucose (s) → α – D – glucose (aq)

                                       ΔH° = 10.72 kJ mol–1

    β – D – glucose (s) → β – D – glucose (aq)

                                       ΔH° = 4.68 kJ.mol–1

    Calculate ΔH° (in kJ/mol) for the mutarotation of solid α – D – glucose to solid β - D – glucose.

    Solutions

    (i) α – D – glucose (aq) → β – D – glucose (aq)   ΔH° = –1.16 kJ mol–1

    (ii) α – D – glucose (s) → α – D – glucose (aq)    ΔH° = 10.72 kJ mol–1

    (iii) β – D – glucose (s) → β – D – glucose (aq)   ΔH° = 4.68 kJ.mol–1

    To obtain reaction

    (iv) α – D – glucose (s) → β – D – glucose (s)  

    (iv) = (ii) + (i) – (iii)

    ∴ ΔH° = 10.72 – 1.16 – 4.68  = 4.88 kJ mol–1

     

  • Question 5/10
    4 / -1



     

  • Question 6/10
    4 / -1

    Racemic mixture of 3-hydroxy-3-methyl cyclohexanone is obtained as a product in reaction -

  • Question 7/10
    4 / -1

    How many of the following will give white ppt of silver salt when treated with ammonical AgNO3 solution?

    (a) CH3–CH2–C≡CH    (b) CH3–C≡C–CH3

  • Question 8/10
    4 / -1

    Select INCORRECT statement regarding KMnO4 & K2Cr2O7.

  • Question 9/10
    4 / -1

    Select CORRECT option regarding formation of molecular orbital from the combination of 1s-1s orbitals.

  • Question 10/10
    4 / -1

    For a d6 metal ion in an octahedral field, the correct electronic configuration is :-

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