What is the arrangement of atoms in the lattice structure of diamond and give contribution of each C atom?

2

(a)

Lithium iodide crystal has a face-centred cubic unit cell.If the edge length of the unit cell is 620pm,determine the ionic radius of I^-ion.

2

(a)

Two liquids A and B boil at 145^oC and 190^oC respectively. Which of them has higher vapour pressure at 80^oC ?

2

(a)

Zn rod weighing 25 g was kept in 100 mL of 1M copper sulphate solution. After certain time interval, the molarity of Cu²⁺ was found to be 0.8 M. What is the molarity of SO₄^2- in the resulting solution and what should be the mass of Zn rod after cleaning and drying ?

2

(a)

While studying the decomposition of N₂O₅(g), it is observed that a plot of logarithm of its partial pressure versus time is linear. what kinetic parameter can be obtained from this ?

2

(a)

Critical temperatures of N₂, CO and CH₄ is 126, 134 and 190 K respectively. Arrange them in increasing order of adsorption on the surface of charcoal. Give reason.

2

(a)

Why copper matte is put in silica lined converter?

2

(a)

Account for the following :    
(a) Chlorine water has both oxidising and bleaching properties.    
(b) H ₃PO₂  and H₃PO₃ act as good reducing agents while H₃PO₄ does not.     
(c) On addition of ozone gas to KI solution, violet vapours are obtained.

2

(a)

How are octahedral complexes with high spin and low spin states formed? what is the condition of their formation?

2

(a)

Name the reagents you will use to bring about the following conversions.
a. Ethane nitrile to ethanal
b. But-2-ene to ethanal

2

(a)

Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.

2

(a)

Why is use of aspartame limited to cold foods and drinks?

2

(a)