What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids?
Number of tetrahedral voids formed = 2 x Number of atoms of element Y
Number of atoms of element Y in the ccp unit cell = 4
Number of tetrahedral voids formed = 2 x 4 = 8
Number of tetrahedral voids occupied by atoms of X = 1/3x8
Ratio of the numbers of atoms of X and Y = 8/3: 4 =2: 3
Hence, the formula of the compound is X2Y3.
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?
Out of BaCl2 and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.
Define limiting molar conductivity. Why conductivity of an electrolyte solution decreases with the decrease in concentration?
Write down the IUPAC name of the following complex:
[Cr(NH3)2Cl2(en)]Cl (en = ethylenediamine)
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.