Solid state MCQ

Solid state

                                                  Confidence  builder

1.             How many number of atoms are there in a cube based unit
                cell having one atom on each corner   and two atoms on each  
              body    diagonal of cube ­

                [a] 8                              [b] 6                                          [c] 4                                           [d] 9

2.             A crystal may have one or more planes and one or more axes of symmetry but it has­

                [a] Two centre of symmetry                                      [b] One centre of symmetry

                [c] No centre of symmetry                                         [d] None ofthese

3.             Ice belongs to which of the following structures -­

                [a] Cubic                     [b] Hexagonal                        [c] Orthorhombic                    [d] Tetragonal

4.             In cubic close packing (ccp) arrangement, the pattern of the successive layers will be designed as   

                [a] AB, AB, AB etc                                                                            [b]AB, ABC, AB etc 

       [c] ABC, ABC, ABC etc                                                      

       [d]None of these

5.             Which among the following will show an isotropy­l

                [a] Glass                      [b] Barium chloride               [c] Wood                                  [d] Paper

6.          For tetrahedral co-ordination the radius ratio (r+ / r–) should be­

                [a] 0.414 – 0.732                                                         [b] > 0.732

                [c] 0.156 - 0225                                                           [d]0.225– 0.414

7.             The number of atoms present in a simple cubic unit cell are ­

                [a] 4                              [b] 3               [c] 2                   [d] 1

8.             The percentage of vacant space of bcc unit cell is :

                [a] 32%                                      [b] 68%                                  [c] 52%                                 [d] 74%

9.             Which is covalent solid ­

                [a] BN     [b] Diamond      [c] Graphite                            [d] All

10.          quartz is a crystalline variety of      

(a)           Silica                      (b)           Sodium silicate

(c)           Silicon carbide      (d)           Silicon

11.          The ability of a given substance to assume two or more
                crystalline structure is called             

                (a)           Amorphism           (b)           Isomorphism

                (c)           Polymorphism      (d)           Isomerism

12.          Which of the following is correct

	Crystal system	Axial distance	Axial angles
(a)	Cubic	a ¹  b = c	a = b ¹ g = 90o
(b)	Monoclinic	a ¹  b = c	a = b = g = 90o
(c)	Rhombohedral	a = b = c	a = b = g ¹ 90o
(d)	Triclinic	a = b = c	a ¹ b = g ¹ 90o

 13.       How many space lattices are obtainable from the different
              crystal systems       

                (a)           7              (b)           14           (c)           32           (d)           230

14.       The arrangement ABC ABC ABC ….. is referred as

 (a)  Octahedral close packing      (b) Hexagonal close packing

(c)   Tetragonal close packing      (d)   Cubic close packing

15       The number of close neighbour in a body-centred cubic lattice of identical sphere is               
 (a)    8                                         (b)   6

(c)   4                                         (d)   2

16     In the closest packed structure of a metallic lattice, the number of nearest neighbours of a metallic atom is 

[JIPMER 2002]

(a)   Twelve                              (b)   Four

(c)   Eight                                  (d)   Six