A) cubic
B) hexagonal
C) orthorhombic
D) rhombohedral
Correct Answer: B
Solution :
For the given crystal \[[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]\] These are the characteristic of a hexagonal system.Crystal class | Axial distance | Axial angle | Possible type of unit cells |
Cubic | \[{{[Co{{(en)}_{3}}]}^{3+}}\] | \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\] | primitive, body centred, face centred |
Tetragonal | \[[Co(en){{(N{{H}_{3}})}_{2}}C{{l}_{2}}]Cl\] | \[Br>F\] | Primitive body centred |
Orthorhombic | \[F>Cl\] | \[Br>Cl\] | Primitive, body centred, face centred, end centred |
Hexagonal | \[F>I\] | \[{{O}_{2}}{{F}_{2}}\] | Primitive |
Trigonal or Rhombohedral | \[{{C}_{2}}{{F}_{2}}\] | \[{{H}_{2}}{{O}_{2}}\] | Primitive |
Monoclinic | \[{{H}_{2}}{{F}_{2}}\] | \[{{C}_{2}}{{H}_{2}}\] | Primitive and endcentred |
Triclinic | \[Ga\] | \[Al\] | primitive |
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