1. Choose the most suitable option/answer for the following questions: The indicator used in titration between KMnO4and Mohr's salt in acidic medium is K4Fe(CN)6

(ii) Methyl blue

(iii) Methyl red

(iv) KMnO4 itself Mond process can be used to purify Ni

(ii) Cu

(iii)Al

(iv) All the above The rate constant of a reaction has the units sec^-1. The order of the reaction is 0

(ii) 1

(iii) 2

(iv) 3 Which among the following is an electrophile NH3

(ii) H2O

(iii) ROH

(iv) BF3 Green vitriol is FeSO4• 7H2O

(ii) H2SO4

(iii) CuSO4• 5H2O

(iv) Na2S2O3• 5H2O The total number of atoms per unit cell in a primitive cell is 1

(ii) 2

(iii) 3

(iv) 4 The hybridization in XeF2 molecule is sp^2

(ii) sp^3

(iii) sp^3d

(iv) sp^2d The number of n-electrons in Benzene is 2

(ii) 1

(iii) 4

(iv) 6
The unit of entropy is J

(ii) L Which among the following is a tetrabasic acid H4P2O6

(ii) H4P2O7

(iii) HPO3

(iv) H3PO4

2. What is Phase rule? Explain with example. What is Eutectic point? Explain. Draw and label the phase diagram of any one component system.

3.(a) Give two main reasons for non-ideal behaviour of gases.
What is Raoult's law? The solubility of MgF2 at room temperature is 0.0012 mol/litre. Calculate the solubility product of MgF2. Find the solubility of MgF2 in 0.1 M MgSO4.

4.(a) What is the maximum number of electrons which can possess the following set of quantum numbers 2

(ii)

(iii) n l=3

(iv) mi 1
Calculate the velocity of electrons ejected from a platinum surface when a radiation of wavelength 150 nm is incident on it. The work function for platinum is about 5 eV. Calculate the shortest frequency of radiation in the Paschen series.

5.(a) Which of the following are extensive properties and which are intensive properties? Viscosity

(ii) Weight

(iii) Mass

(iv) Specific gravity Refractive index

(vi) Volume of a solid Derive Arrhenius equation showing the effect of temperature on reaction rate.

(c) A Carnot engine operating between 480 K and 600 K absorbs 4184 J of heat from the source per cycle. What is the work done per cycle Also, find the heat given out to sink. What is the efficiency of the engine

6.(a) Given the following data <img src='./qimages/9762-6a.jpg'> <br><br>

Plot 1/[ester] v/s t and show that it is a second order reaction. Also, determine its rate constant.
Define Le Chatelier's principle and discuss its applications.

7.(a) Write the electronic configuration of any two of the following elements

15P, 23V, 64Gd (Subscript is At. No) Which member of each of the following pairs of atoms has greater radius and why? Li or F

(ii) Se or Ca

(iii) Br or S
Cu or Ni

(c) Write the balanced equation for the following reactions Al2O3 dissolved in a basic solution (NaOH)

(ii) Addition of NH4Cl to the solution in above produces white precipitate

8. What are the commercial uses of Ar, Ne and He? Explain briefly, why most transition metal complexes are paramagnetic. Predict the geometry of complexes formed by transition metal ions using the following hybrid orbitals d2sp^3

(ii) dsp^2

9.(a) Show that bond order in unhybridised CO is 2.
The molecule HCN is isoelectronic with N2. Discuss bonding in HCN. Calculate the packing fraction of a simple cubic lattice.

10.(a) Write the structure of the following: 4-trimethylhexane

(ii) 2,3-dimethylbutane Give the structures and names of the products A and B in the following reactions:
<img src='./qimages/9762-10b.jpg'>

(ii) Compound A as in above C2H5OH
compound B
Explain what is meant by "Coke" and "Coal tar".