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Chemistry Test ...

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  • Question 1
    4 / -1

    A reaction mixture containing H2, N2 and NH3 has partial pressures 2 atm,1 atm and 3 atm respectively at 725 K. If the value of Kp for the reaction, N2(g) + 3H2(g) ⇌ 2NH3(g) is 4.28 × 10−5 atm−2 at 725 K, in which direction the net reaction will go ?

  • Question 2
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    If SO2 content in the atmosphere is 0.12ppm by volume, pH of rain water is (assume 100% ionisation of acid rain as monobasic acid)

  • Question 3
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    Consider the following reaction

    Which of the following statements are correct ?

    a. I is the major product of the reaction

    b. II is the major product of the reaction

    c. Formation of I is in accordance with Saytzeff's rule

    d. II is more stable because it is more substituted

  • Question 4
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  • Question 5
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    Assertion (A): Mg2+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that in Mg2+.

    Reason (R): The effective nuclear charge on the outermost electrons in Al3+ is greater than that in Mg2+.

    The correct option among the following is

  • Question 6
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    Electromagnetic radiations having λ = 310 Å are subjected to a metal sheet having work function = 12.8 eV. What will be the velocity of photoelectrons with maximum Kinetic energy.

  • Question 7
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    Azide ion [N3-] exhibits an (N−N) bond order of 2 and may be represented by the resonance structures I,II and III given below:

    The most stable resonance structure is

  • Question 8
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    C—Cl bond in  (vinyl chloride) is stabilised in the same way as in

  • Question 9
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    The following equations are balanced atomwise and chargewise.

    (i) Cr2O72- + 8H+ + 3H2O2 → 2Cr3+ + 7H2O + 3O2

    (ii) Cr2O72- + 8H+ + 5H2O2→ 2Cr3+ + 9H2O + 4O2

    (iii) Cr2O72- + 8H+ + 7H2O2→ 2Cr+ + 11H2O + 5O2

    The precise  equations representing the oxidation of H2O2 is/are

  • Question 10
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    In the general electronic configuration -

    (n - 2)f1-14 (n - 1)d0-1 ns2, if value of n = 7 the configuration will be -

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