1. Write the correct choice for the following:
A hybrid orbital is obtained by taking a linear combination of atomic orbitals of an atom. What is the hybridization of C2H2 and BF3
sp^3

(ii) sp2,sp

(iii) sp, sp^3

(iv) sp^3d
The fact that urea or boric acid are solids at room temperature is attributed to the formation of
Covalent bonding
Ionic bonding

(iii) H-bonding
Co-ordinate bonding Which of the following are extensive properties Viscosity, Weight

(ii) Weight, Mass

(iii) Temperature, Surface tension

(iv) Specific gravity, Refractive index
The first order rate constant for the decomposition of N205 is 6.2 x What is the half-life for this decomposition? 1062·8 s
1117.7 s

(iii) 1000·5 s

(iv) 1120.7 s There are several reactions in which an intermediate product is generated that catalyzes the reaction. Such products are called
Acid/Base catalysts

(ii) Biological catalysts

(iii) Autocatalysts

(iv) None of the above
Consider the system consisting of the three solids Fe304,FeO and Fe203. How many components are there?
Bivariant
Trivariant

(iii) Univariant

(iv) Invariant
Contact process for the manufacture of H2S04 is an exothermic reaction and proceeds with a decrease in volume. Hence the formation of S03 is favoured by

2S02 02 2S03, LlH =-22.1 kcal Low temperature, High pressure

(ii) High temperature, High pressure

(iii) High temperature, Low pressure

(iv) Low temperature, Low pressure In order to protect steel structures from corrosion, which of the following will be useful? Ni, Na, Pb

(ii) Zn, Mg, Al2

(iii) Na, Pb, Cd

(iv) Ni, Pb, Cd Sodium hydroxide flakes or pellets should not be exposed to air as they are deliquescent and absorb
02

(ii) N2

(iii) S02

(iv) CO2 In zeolite method, Na ions in the pores of the zeolite can be exchanged by Al3

(ii) OH^­

(iii) Ca^2

(iv)

2.(a) Write the balanced equation for the following reactions
Al2O3 dissolved in a basic solution (NaOH).
Addition of NH4Cl to the solution from produces a white precipitate.

(iii) Thermal decomposition of the precipitate from restores Al2O3. Through Zirconium and Hafnium occur in group-4 (IV group, they belong to the fifth and the sixth periods respectively. Explain why their size is almost identical instead of Hf being larger than Zr =40).
Predict the geometry of complexes formed by transition metal ions, using the following hybrid orbitals:
sp^3
d^2sp^3

(iii) dsp^2
Write the name of the following complexes:
[Cr(H20)4Cl2]Cl

3.(a) Give reasons for the following: Instead of electrolysing water, an aqueous solution of an alkali is electrolysed to manufacture hydrogen.

(ii) In steam-hydrocarbon reforming process for hydrogen, excess of steam is used. Describe the contact process with a flow chart for the manufacture of sulphuric acid.

4.(a)How would you prepare aspirin from ortho-hydroxybenzoic acid (salicylic acid)? How would you convert 2-propanol to propene, propyne into 2-butene and 2-butene into butane? Explain how methane is used in the synthesis of ammonia and methanol.

5.(a) Write a short note on thermosetting plastics.
What do you understand by Genetic Engineering?

6.(a) Draw and explain the phase diagram of one component system.
Benzene boils at 80°C and the entropy of vaporisation is 88 mol^-1. What is the vapour pressure of benzene at 27°C?
Write the Mass law expression for the equilibrium constant for the following reactions
CH4(g) 2H2S(g) CS2(g) 4H2

(ii) HgO(s) 1/2 O2(g)

(iii) Fe2O3(s) SO2(g) SO3(g)

(iv) 1/2 H20(l)

7.(a) Atomic Al (atomic weight -26·98 g/mol) crystallizes into an FCC structure with a density of 2698 kg/m^3. X-rays of wavelength 0·1537 nm, when diffracted from planes of this lattice, gave a maximum intensity at an angle of 19.2°. Calculate the Avogadro number, using the above information. Draw the energy level diagram of XeF2. The geometry of HgCl2 is <img src='./qimages/11904-7c.jpg'>

What is the electronic configuration of Hg Which orbitals contribute to bonding in HgCl2?

8.(a) Explain Heisenberg's uncertainty principle with relationship between energy and momentum.
What is the probability of finding a particle in a I-dimensional box in the state n 1 in a small distance of 0·1 A at the centre of the box of length 10

9.(a) Given the following data for reactions under the standard conditions, calculate the heat of formation of methane: 1/2 H20(l) 286kJ
CO2(g) 394 kJ

(iii) CH4(g) 2O2(g) CO2(g) 2H20(l) 890 kJ

What is MH for the reaction
2H2(g) CH4(g)
The half-life for a reaction between A and B varied with initial pressure as shown in the
table below:

Assume A B Products <img src='./qimages/11904-9b.jpg'>

What is k for the reaction?
Write a short note on Acid/Base catalysis.

10.(a) Complete the reaction sequence. <img src='./qimages/11904-10a.jpg'>
Draw the Newman projection of butane using the C-2 to C-3 bond as reference in the eclipsed form. Complete the reaction sequence. <img src='./qimages/11904-10c.jpg'> Complete the sequence.

<br><br> <img src='./qimages/11904-10d.jpg'>

(e)Write the IUPAC name of <img src='./qimages/11904-10e.jpg'>