Multiple choice

Match Column–I with Column–II ||| |---|---| |Column-I |Column-II| |A. Monoclinic crystal system|1. a ≠ b ≠ c, α = β = γ = 90°| |B. Tetragonal crystal system|2. a = b = c, α = β = γ ≠ 90°| |C. Orthorhombic crystal system|3. a ≠ b ≠ c, α = γ = 90°, β ≠ 90°| |D. Trigonal crystal system|4. a = b ≠ c, α = β = γ = 90°|

  1. A - 4, B - 3, C - 2, D - 1

  2. A - 3, B - 4, C - 1, D - 2

  3. A - 2, B - 1, C - 3, D - 4

  4. A - 3, B - 2, C - 4, D - 1

  5. A - 1, B - 2, C - 3, D - 4
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B Correct answer
Explanation

Crystal systems are differentiated on the basis of their edge lengths and axial angles. So, option 2 classifies them on this basis. Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90° Tetragonal a = b ≠ c, α = β = γ = 90° Orthorhombic a ≠ b ≠ c, α = β = γ = 90° Trigonal a = b = c, α = β = γ ≠ 90°

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