ThePrismSolutions

ThePrismSolutions

DAILY PRACTICE PAPER(9Th June 2018)

Q. Which of the following is/are not true about hexagonal close packing ?

(a) It has 26% empty space     
(b) In this arrangement, third layer is identical to the first layer.
(c) The coordination number in this arrangement is 6.     
(d) It is as closely packed as body centred cubic packing.

Q. Number of atoms per unit cell of bcc is :

(a)  1      (b) 2

(c)  8      (d) 4

Q. Radius ratio of an ionic compound is 0.93. The structure of the above ionic compound is of :

(a)  NaCl type            (b)  CsCl type

(c)  ZnS type              (d) none of these

Q. CsCl has co-ordination number ratio :

(a) 6 : 6          (b) 8 : 8          

(c) 4 : 4           (d) none of these

Q. Sodium chloride, NaCl usually crystallizes in a face centred cubic lattice. How many ions are in contact with any single Na+ ion ? :

(a) 4         (b) 6    

(c) 8         (d) 1



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