103) Which of the following compounds has an antifluorite structure?

104) In a solid AB, having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is:

105) The yellow colour of ZnO and conducting nature produced upon heating is due to:

106) To 500 cc of water, 3 x 10⁻³ kg of acetic acid is added. If 23% of acetic acid is dissociated, what will be the depression in freezing point? K_f and density of water are 1.86 K⁄kg and 0.0997 gm⁄cc respectively.

107) A 0.1M solution of K₂SO₄ is dissolved to the extent of 90%. What would be its osmotic pressure at 27^oC?