Match the items in column I with the items in column II.
Column I | Column II |
a. Hexagonal unit cells | i. a ≠ b ≠ c and α=γ=90°β≠90° |
b. Face-centred unit cells | ii. 2 atoms per unit cells |
c. Monoclinic unit cells | iii. 4 atoms per unit cell |
d. End-centred unit cells |
iv. a = b ≠ c and α = β = 90° γ = 120° |
1. a-iv; b-ii; c-i, d-iii
2. a-ii; b-i; c-iv, d-iii
3. a-iv; b-iii; c-i, d-ii
4. a-iii; b-iv; c-i, d-ii
The lattices has the highest packing efficiency among the following is-
1. Simple cubic
2. Body-centred cubic
3. Hexagonal close-packed lattice
4. None of the above
Statement 1: | ZnS shows Frenkel defect. |
Statement 2: | AgBr shows Frenkel as well as Schottky defect. |