What is reduced pressure distillation? How is it useful?

Calculate the lattice energy (in Units kJ mol^-1) for ZnO crystal using Eq. 3.4 based on electrostatic model and using a Born-Haber cycle. Compare the two answers and comment on any difference.

Useful data:

Medelung constant (4) - 1.6411

Born Constant (n)-8

Internuclear distance (a) = 199 pm

Zn(s) + 1/2 O₂(g) → ZnO(s) ΔH_f-350.5 kJ mol^-¹

Zn(s) → Zn(g)  ΔH_s-130.4 kJ mol^-¹

Zn(g) → Zn⁺ (g) J(Zn)-906.3 kJ mol^-¹

Zn⁺(s) → Zn²⁺(g) J(Zn⁺)-1733 kJ mol^-¹

1/2 0₂(g) → O(g) 1/2ΔH_d-248.5 kJ mol^-¹

0(g)→O^-(g) E_A(O)-141 kJmol^-¹

O^-(g) →0²(g) E_A(O^-)--780 kJ mol^-¹

Explain the reason for the variation of the first ionization energies of the third period elements.

Derive van der Waals equation.

Write the values of four quantum numbers for 3d electrons.

Derive an expression for calculating energy values corresponding a 3 for a particle in one dimensional box.

Using a suitable diagram, explain the most probable speed, the average speed and the root mean square speed

State the assumptions made by Langmuir to obtain the absorption isotherm.

Calculate the ionization energy of hydrogen atom using Bohr's theory.

What is the dimensional formula and SI unit of pressure?

Describe the common features which can be explained by the theoretical model of Bohr? Briefly write the limitation of this model.

How can the disease vectors be genetically manipulated to reduce their population?

Explain the concept of Integrated Vector Management.

Myiasis

Chemical control of housefly

Cultural control of Musca

Traps used for controlling houseflies

How is the classical complement pathway activated? Discuss with a suitable diagram.

Draw a labeled diagram of.

a) Life cycle of Aedes mosquito

b) Dengue transmission Cycle

c) Zika Transmission Cycle

Explain the significance of the different classes of antibodies.