Mass of one atom of an element is 6.645 x 10^-23g. How many moles of element are there in 0.320 kg.

Balance the following equations by ion electron method.
i) \({ KMn }O_{ 4 }+{ SnCl }_{ 2 }+HCI\longrightarrow MnCI_{ 2 }+{ SnCI }_{ 4 }+{ H }_{ 2 }O+KCI\)
ii) 
iii) 
iv) 

Balance the following equation using oxidation number method
As₂ S₃ + HNO₃ + H₂O \(\rightarrow\) H₃ AsO₄ + H₂ SO₄ + NO

State and explain pauli exclusion principle.

i) Describe the Aufbau principle.     
ii) What is effective nuclear charge ?

Explain the pauling method for the determination of ionic radius.

How do you convert para hydrogen into ortho hydrogen?

Explain the important common features of Group 2 elements.

Distinguish between diffusion and effusion.

Define the following terms
(a) isothermal process (b) adiabatic process
(c) isobaric process (d) isochoric process

List the characteristics of Gibbs free energy

Calculate the enthalpy change for the reaction
Fe₂O₃ + 3CO ⟶ 2Fe + 3CO₂ from the following data.
2Fe +\(\frac{3}{2}\)O₂ ⟶ Fe₂O₃; ΔH = -741 kJ
C +\(\frac{1}{2}\)O₂ ⟶ CO; ΔH = -137 kJ 
C + O₂ ⟶ CO₂; ΔH = - 394.5 kJ

When I-pentyne (A) is treated with 4N alcoholic KOH at 175°C, it is converted slowly into an equilibrium mixture of 1.3% I-pentyne(A) , 95.2% 2-pentyne(B) and 3.5% of 1,2 pentadiene (C) the equilibrium was maintained at 175°C, calculate ΔG0 for the following equilibria.
B \(\rightleftharpoons \)AGIO?
B \(\rightleftharpoons \)CG20?

The equilibrium constant at 298 K for a reaction is 100.
A + B \(\rightleftharpoons \) C + D
If the initial concentration of all the four species is 1 M, the equilibrium concentration of D (in mol lit^-1) will be

State and explain Henry’s law.

Explain resonance with reference to carbonate ion ?

Explain VSEPR theory. Applying this theory to predict the shapes of IF₇, and SF₆.

Describe the reactions involved in the detection of nitrogen in an organic compound by Lassaigne method.

Identify the compound A, B, C and D in the following series of reactions

Differentiate the following
(i) BOD and COD
(ii) Viable and non-viable particulate pollutants

Arrange the elements silver, Zinc and copper in the order of their decreasing electron releasing tendency and justify your arrangement with an appropriate experiment.

Balance the following equations by oxidation number method.
P + HNO₃ ⟶ HPO₃ + NO + H₂O

Give the chemical properties of heavy water and water.

Explain the preparation and uses of the following compounds of calcium.

Explain P-V relationship experiments of Robert Boyle.

If a scuba diver takes a breath at the surface filling his lungs with 5.82 dm³ of air what volume will the air in his lungs occupy when he drives to a depth where the pressure is 1.92 atm. (assume temperature is constant and the pressure at the surface is exactly)

At sea level a balloon has volume of 785 x10^-3dm³ What will be its volume, if it taken to a place where the pressure is 0052 atm. Less than the atmospheric pressure of 1 atm.

The critical temperature of hydrogen gas is 33.2 °C and its critical pressure is 12.4 atm. Find out the values of a and b.

Explain Andrew's isotherm of carbon dioxide.

Calculate the entropy change in the engine that receives 957.5 kJ of heat reversibly at 110°C temperature.