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Account for the following:
Cu+ ion is unstable in aqueous solution.
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`E_((M^(2+)/M)` |
Cr | Mn | Fe | Co | Ni | Cu |
| -0.91 | -1.18 | -0.44 | -0.28 | -0.25 | -0.34 |
From the given data of E0 values, answer the following questions :
(1) Why is `E_(((Cu^(2+))/(Cu)))` value exceptionally positive
(2) Why is `E_(((Mn^(2+))/(Mn)))` value is highly negative as compared to other elements
(3) Which is the stronger reducing agents Cr2+ or Fe2+ ? Give Reason.
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What is the effect of temperature on chemisorption ?
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Write the structure of p-methylbenzaldehyde.
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How will you distinguish between the following pair of terms?
Crystal lattice and unit cell
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Account for the following:
Zn is not considered as a transition element.
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Account for the following:
E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+.
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Out of Mn3+ and Cr3+, which is more paramagnetic and why ?
(Atomic nos. : Mn = 25, Cr = 24)
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Why is adsorption always exothermic?
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Write the structure of 4-chloropentan-2-one.
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Give the significance of a ‘lattice point’.
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Name the parameters that characterize a unit cell.
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Which of the following lattices has the highest packing efficiency (i) simple cubic (ii) body-centred cubic and (iii) hexagonal close-packed lattice?
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What is meant by the term ‘coordination number’?
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How would you determine the standard electrode potential of the system \[\ce{Mg^{2+} | Mg}\]?
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Consult the table of standard electrode potentials and suggest three substances that can oxidise ferrous ions under suitable conditions.
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Calculate the standard cell potential of a galvanic cell in which the following reaction takes place:
\[\ce{2Cr_{(s)} + 3Cd{^{2+}_{(aq)}} -> 2Cr{^{3+}_{(aq)}} + 3Cd}\]
Calculate the ΔrG° and equilibrium constant of the reaction.
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A first order reaction has a rate constant 1.15 × 10−3 s−1. How long will 5 g of this reactant take to reduce to 3 g?
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Time required to decompose SO2Cl2 to half of its initial amount is 60 minutes. If the decomposition is a first order reaction, calculate the rate constant of the reaction.
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