Questions
Match the following columns.
Column I | Column II | ||
A. | Simple cubic and face centred cubic | p. | Have these cell parameters |
B. | Cubic and rhombohedral | q. | Are two crystal systems. |
C. | Cubic and tetragonal | r. | Have only two crystallographic angles of 90o. |
D. | Hexagonal and monoclinic | s. | Belong to same crystal system. |
detailed solution
Correct option is A
A→p,s;B→p,q;C→q;D→q,rFor cubic system all the sides and angles are equal. Cubic, rhombohedral, tetragonal, hexagonal and monoclinic are the types of crystal system. For hexagonal and monoclinic system only two crystallographic angles are of 90o. i.e. α=β=90∘ or α=γ=90∘.Similar Questions
Match the type of unit cell given in Column I with the features given in Column II.
Column I | Column I | ||
A. | Primitive cubic unit cell | 1. | Each of the three perpendicular edges compulsorily have the different edge length,i.e |
B. | Body centred cubic unit cell | 2. | Number of atoms per unit cell is one. |
C. | Face centred cubic unit cell | 3. | Each of the three perpendicular edges compulsorily have the same edge length,i.e. |
D. | End centred orthorhombic unit cell | 4. | In addition to the contribution from the corner atoms the number of atoms present in a unit cell is one. |
5. | In addition to the contribution from the corner atoms the number of atoms present in a unit cell is three. |
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