Sodium
crystallizes in the cubic lattice and the edge of the unit cell is 430 pm.
Calculate the number of atoms in a unit cell. What is the structure of sodium
crystal?
(Density
of ,
atomic mass of )
2
Give
reasons:
(a)
Aluminum metal cannot be produced by the electrolysis of aqueous solution of aluminum
salt.
1
(b)
Rusting of iron is quicker in saline water than ordinary
water. 1
A
reaction is of 1st order in A and 2nd order in B.
(a)
Write differential rate
equation. 1
(b)
How is the rate affected when the concentrations of both A and B are doubled? 1
(a)
Complete the following reaction
: 1
(i)
(ii)
(b)
Give reasons for the
following: 1
(i)
Nitric oxide becomes brown when released in air.
(ii)
is
ionic in nature in the solid state.
What
happens when (Give only reactions) :
(a)
Chlorobenzene is subjected to
hydrolysis. 1
(b)
Ethyl chloride is treated with aq. .
1
(c)
Methyl chloride is heated with .
1
Describe
the role of the following :
(a)
Cryolite in metallurgy of.
1
(b)
Role of Silica in extraction of copper. 1
(c)
in the
extraction of silver from a silver ore. 1
(a)
Write chemical equation for :
(i)
Cannizaro's reaction
1
(ii)
Hell-Volhard Zelinsky reaction
1
(b)
Complete the following reactions:
(i)
(ii)
1
(iii)
1
(a)
What is the basic difference between the electronic configuration of the
transition and inner transition
elements? 2
(b)
Write ionic equation for the conversion of:
(i)
Chromate to dichromate 1
(ii)
Manganate to permanganate 1
(iii)
Permanganic to manganese 1