The following data were obtained during the first order thermal decomposition of at a constant volume

Calculate the rate constant.

(Given: Log4 = 0.6021 and Log2 = 0.3010)

1) what type of stoichiometric defect is shown by KCl and why?

2) What type of semiconductor is formed when silicon is doped with As?

3) Which one of the following is an example of molecular solid:

4) What types of substances would make better magnets, ferromagnetic and ferrimagnetic?

I) Write two advantages of fuel cell over ordinary cell.

II) Equilibrium constant () for the given cell reaction is 10. Calculate .

I) Write the expression for the Freundlich adsorption isotherm for the adsorption of gases on solids in the form an equation.

II) What are the dispersed phase and dispersed medium of butter?

III) A delta is formed at the meeting place of sea and river water. Why?

A) I) What are the different oxidation states exhibited by the lanthanoids?

II) Write two characteristics of the transition elements.

III) Which of the 3d-block elements may not be regular as the transition elements and why?

OR

Assign the suitable reasons for the following:

i) The compounds are more stable than towards oxidation to their +3 state.

ii) In the 3d series from Sc (Z = 21) and Zn (Z = 30), the enthalpy of atomization of Zn is the lowest.

iii) is colorless in aqueous solution whereas is colored