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Question

# Column-I and Column-II contain four entries each. Entries of Column-I are to be matched with some entries of Column-II. One more than one entries of Column-I may have the matching with the same entries of Column-II. List -I List -I (i) Tetragonal and hexagonal (P)a=b≠c (ii) Cubic and Rhombohedral (Q) α=β=γ (iii) Monoclinic and triclinic (R) a≠b≠c (iv) Orthorhombic (S) a=b=c Which of the following option has the incorrect combination considering List-I and List-II

A
iP
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B
iiiR
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C
iiQ
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D
ivS
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Solution

## The correct option is D iv−S Crystal system Edge length Axial angle Tetragonal a=b≠c α=β=γ=90o Hexagonal a=b≠c α=β=90o, γ=120o Cubic a=b=c α=β=γ=90o Rhombohedral a=b=c α=β=γ=90o Monoclinic a≠b≠c α=γ≠90o, β≠90o Triclinic a≠b≠c α≠β≠γ≠90o Orthorhombic a≠b≠c α≠β≠γ≠90o

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