Question
Explain the relationship between $\Delta G$ and $E _{\text {cell }}^{\circ}$ with the help of an example.

Answer

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Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron(II) ions (ii) SO2 and (iii) oxalic acid? Write the ionic equations for the reactions.
Explain the electrophilic substitution reactions of amine.
Match the terms given in Column I with the units given in Column II.

 
Column I

 

Column II

i.

$\text{K}$

a.

$\text{I}\times\text{t}$

ii.

$\wedge_{\text{m}}$

b.

$\frac{\wedge_{\text{m}}}{\wedge^\circ_\text{m}}$

iii.

$\alpha$

c.

$\frac{\text{k}}{\text{c}}$

iv.

$\text{Q}$

d.

$\frac{\text{G}^*}{\text{R}}$

How are different aromatic compounds synthesized by benzene diazonium chloride? Explain with examples.
  1. Why do transition elements show variable oxidation states?
  1. Name the element showing maximum number of oxidation states among the first series of transition metals form Sc (Z=21) to Zn (Z=30).
  2. Name the element which shows only +3 oxidation state.
  1. What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.
Expian the basic properties of amines.
Derive the equation required for finding the activation energy.
  1. Name the element of 3d transition series which shows maximum number of oxidation states. Why does it show so?
  2. which transition metal of 3d series has positive Eo(M2+/M) value and why?
  3. Out of Cr3+ and Mn3+, which is a stronger oxidizing agent and why?
  4. Name a member of the lanthanoid series which is well known to exhibit +2 oxidation state.
  5. Complete the following equation:

MnO-4+8H++5e-$→$

Explain the limitations of valence bound theory.
Match the statements given in Column I with the oxidation states given in Column II.
 
Column I
 
Column II
(i)
Oxidation state of Mn in MnO2 is
(a)
+2
(ii)
Most stable oxidation state of Mn is
(b)
+3
(iii)
Most stable oxidation state of Mn in oxides is
(c)
+4
(iv) Characteristic oxidation state of lanthanoids is
(d)
+5
    (e) +7