Short Answer TypeHow many atoms constitute one unit cell of a face-centered cubic crystal?Â
Number of atoms in one face centred cubic unit cell can be determined:-
Â
(i) 8 corners atoms × 1/8 per corner atom =  
= 1 atom
(ii) 6 face-centered atoms × 1/ 2 atom per unit cell = 
= 3 atoms
Â
∴ Total number of atoms per unit cell = 4 atoms
Arrange the following in increasing order of their basic strength in aqueous solution:Â
 CH3NH2, (CH3)3N, (CH3)2NH
18 g of glucose, C6H12O6Â (Molar Mass = 180 g mol-1) is dissolved in 1 kg of water in a saucepan. At what temperature will this solution boil?Â
 (Kb for water = 0.52 K kg mol-1, boiling point of pure water = 373.15 K)
The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm-1. Calculate its molar conductivity?
Write the dispersed phase and dispersion medium of the following colloidal systems:Â
 (i) Smoke (ii) Milk
What are lyophilic and lyophobic colloids? Which of these sols can be easily coagulated on the addition of small amounts of electrolytes?
Write the differences between physisorption and chemisorption with respect to the following:
(i) Specificity
(ii) Temperature dependence
(iii) Reversibility and
(iv) Enthalpy change
Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver?Â
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