The
radius of ion is
169 pm and that of ion
is 181 pm.
(i)
What will be the co-ordination numbers of ions
in this structure? 1
(ii)
What is the type of crystal structure for?
1
(i)
Draw a systematic graph showing how the rate of a 1st order reaction
changes with change in the concentration of the
reactants. 1
(ii)
Rate of reaction of one reaction . What
are the units for the rate and rate constant for this
reaction? 1
Answer
the following :
(i)
Name a salt that can be added to so as
to produce cation vacancies. 1
(ii)
When is the entropy of a perfectly crystalline solid
zero? 1
(i)
State the factors that influence the value of cell potential of the following
cell :
1
(ii)
Write nernst equation to calculate the cell potential of the above
cell. 1
(a)
State two main differences between globular protein and fibrous
protein. 1
(b)
Name the main disease caused due to lack of the vitamin and its sources in each
of the following:
.
2
Illustrate
with examples :
(a)
Homogeneous and hetrogeneous catalysis. 1
(b)
Multi molecular and macromolecular
colloids. 1
(c)
Lyophilic and lyophobic
sols. 1
Account
for the following :
(a)
Phenol has a smaller dipole moment than methanol. 1
(b)
Unlike phenols, alcohols are easily
protonated. 1
(c)
Alcohols act as weak
bases. 1
If
E° copper electrode is + 0.34 V, how will you calculate its e.m.f. value when
the solution in contact with it is 0.1 M in copper ions?
How
does e.m.f. for copper electrode change when concentration of ions in
the solution is decreased.
Why
is the mass determined by measuring a colligative property in case of some solutes
abnormal? Discuss it with the help of Vant Hoffs factor. (Value
Based)
(a)
Give reasons of the following :
(i)
The transition metal and their compounds acts as good catalyst. 1
(ii)
The E° value for couple
is much more positive than the lanthanoid contraction. 1
(iii)
The enthalpies of atomisation of transition elements are high.
1
(b)
State the probable oxidation states of the transition metals with the following
configuration in their ground state: 2
(i)
(ii)
(iii)
(iv)
.