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Chemistry Test ...

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  • Question 1
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    The correct stability order of the following resonance structures is?
    (i) \(\mathrm{H}_{2} \mathrm{C}=\overrightarrow{\mathrm{N}}=\overline{\mathrm{N}}\)
    (ii) \(\mathrm{H}_{2} \mathrm{C}-\mathrm{N}=\overrightarrow{\mathrm{N}}\)
    (iii) \(\mathrm{H}_{2} \overline{\mathrm{C}}-\overrightarrow{\mathrm{N}} \equiv \mathrm{N}\)
    (iv) \(\mathrm{H}_{2} \overline{\mathrm{C}}-\mathrm{N}=\overrightarrow{\mathrm{N}}\)

  • Question 2
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    Nickel (Z = 28) combines with a uninegative mono dentate ligand X- to form a paramagnetic complex [NiX4]2-.The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively

  • Question 3
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    Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?

  • Question 4
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    The number of σ- and π-bonds in 5-oxohexanoic acid, respectively, is :

  • Question 5
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    The correct order of reducing ability for the four successive elements Cr, Mn, Fe and Co is: Their Eored values are given below.

    \(\mathrm{E}_{\mathrm{Mn}^{2+} / \mathrm{Mn}}^{\circ}=-1 \cdot 18 \mathrm{V}\)
    \(\mathrm{E}_{\mathrm{Cr}^{2+} / \mathrm{Cr}}^{\circ}=-0 \cdot 91 \mathrm{V}\)
    \(\mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^{\circ}=-0 \cdot 44 \mathrm{V}\)
    \(\mathrm{E}_{\mathrm{Co}^{2+} / \mathrm{Co}}^{\circ}=-0 \cdot 28 \mathrm{V}\)

  • Question 6
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    The boiling point elevation constant for toluene (b.pt = 110.7oC) is 3.32 K molality-1. The entropy of vaporization of toluene in JK-1 mole-1 is :

  • Question 7
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    Which one of the following reactions of Xenon compounds is not feasible?

  • Question 8
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    The shape of XeF4 is :

  • Question 9
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    How many moles of KMnO4 are needed to oxidise a mixture of 1 mole each of FeSO4, FeC2O4 and Fe2(C2O4)3 completely in acidic medium :

  • Question 10
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    A real gas has equation of state \(P=\frac{R T}{V_{m}-b T}-\frac{a}{V_{m}^{3}}\left(V_{m}\right.\) is molar volume). Find a and \(b\) in terms of \(V_{c}\) and \(T_{c} .\) where \(V_{c}\) and \(T_{\mathrm{c}}\) are critical constants of gas.

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