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Chemistry Test ...

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  • Question 1
    1 / -0

    Heating mixture of Cu2O and Cu2S will give

  • Question 2
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    The following species having which hybridisation ?

    \(S b C l_{6}^{-}, S n C l_{6}^{2-}, X e F_{5}^{+}\) and \(I O_{6}^{5-}\)

  • Question 3
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    The most stable resonating structure of following compound is

  • Question 4
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    The common features among the species CN– , CO and NO+ are

  • Question 5
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    Among NO2+ KO2, Na2O2, and NaAlO2, which is paramagnetic ?

  • Question 6
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    Based on following information determine the value of \(x\) and \(y\) \(\Rightarrow\left\{\begin{array}{cccc}\left(\mathrm{CH}_{3}\right)_{\mathrm{x}} \mathrm{AlCl}_{\mathrm{y}} & \mathrm{x}\left(\mathrm{CH}_{4}\right)(\mathrm{g}) & + & \underbrace{\mathrm{yCl}+\mathrm{Al}^{3+}}_{\downarrow} \\ & & \mathrm{AgCl}(\mathrm{s}) \\ 0.643(\mathrm{g}) & 0.222 \mathrm{g} & 0.9969 \mathrm{g} \\ \mathrm{I} & \mathrm{II} & \mathrm{III}\end{array}\right.\)
    atomic masses of \(\mathrm{Al}\), \(\mathrm{Cl}\) and \(\mathrm{Ag}\) are respectively 27,35.5,108 .

  • Question 7
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    A sample of an ideal gas is expanded from original volume of \(1 \mathrm{m}^{3}\) to twice its volume in a reversible process for which \(\mathrm{p}=\alpha \mathrm{V}^{2} \quad\left(\alpha=5 \mathrm{atm} \mathrm{m}^{-6}\right)\)
    Calculate
    (i) Work done on \(P\) - V diagram
    (ii) Calculate \(\Delta \mathrm{S}_{\mathrm{m}}\) if \(\mathrm{C}_{\mathrm{Vm}}=20 \mathrm{J} \mathrm{K}^{-1} \mathrm{m}^{-1}, \mathrm{R}=8 \mathrm{JK}^{-1} \mathrm{m}^{-1}\) and \(\mathrm{In} 2=0.7\)
    The values of work done \(\& \Delta S_{m}\) may be

  • Question 8
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    In a cell that utilizes the reaction \(Z n(s)+2 \mathrm{H}^{+}(\mathrm{aq}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{H}_{2}(\mathrm{g})\) addition
    of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to cathode compartment, will:

  • Question 9
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    A crystal made up of particles X, Y, and Z. X forms fcc packing. Y occupies all octahedral voids of X and Z occupies all tetrahedral voids of X. It all particles along one body diagonal are removed, then the formula of the crystal would be

  • Question 10
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    A solution which is 10–3 M each in Mn2 + , Fe2 + , Zn2 + and Hg2 + is treated with 10 - 16 M sulphide ion. If Kspof MnS, FeS, ZnS and HgS are 10 - 13 , 10–18 , 10–24 and 10–53 respectively, which one will precipitate first ?

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