Out of BaCl₂ and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.

2.

What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3^rd of tetrahedral voids?

What is the basicity of H₃PO₄?

 What is meant by positive deviations from Raoult's law? Give an example. What is the sign of _mixH for positive deviation?

OR

Define azeotropes. What type of azeotrope is formed by positive deviation from Raoult's law? Give an example.

Following reactions occur at cathode during the electrolysis of aqueous silver chloride solution:

Ag⁺ (aq) + e-  →  Ag(s)          E° = +0.80 V

 H⁺ (aq) + e-   → 1/2 H₂ (g)     E° = 0.00 V

 On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why?

Define limiting molar conductivity. Why conductivity of an electrolyte solution decreases with the decrease in concentration?

What are the transition elements? Write two characteristics of the transition elements ?

Write down the IUPAC name of the following complex:

[Cr(NH₃)₂Cl₂(en)]Cl    (en = ethylenediamine)

Write the formula for the following complex:

Pentaamminenitrito-o-Cobalt (III)

Draw the geometrical isomers of complex [Pt(NH₃)₂Cl₂]?