Question

Match the List-I with List-II.

	List-I		List-II
	(Crystal lattice)		(Parameters)
(P)	Tetragonal	(1)	a = b ≠ c
(Q)	Monoclinic	(2)	α ≠ β, γ = 90°
(R)	Rhombohedral	(3)	a ≠ b ≠ c, α ≠ β ≠ γ ≠ 90°
(S)	Triclinic	(4)	a = b = c, α = β = γ ≠ 90°
		(5)	a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Answer 1

(P) - (1) (Q) - (5) (R) - (4) (S) - (3)

Answer 2

The crystal lattice types are defined by specific relationships between their axial lengths (a, b, c) and interfacial angles (α, β, γ).

• Tetragonal: a = b ≠ c, α = β = γ = 90°. Matches with (1) a = b ≠ c.

• Monoclinic: a ≠ b ≠ c, α = γ = 90°, β ≠ 90°. Matches with (5) a ≠ b ≠ c, α = γ = 90°, β ≠ 90°.

• Rhombohedral: a = b = c, α = β = γ ≠ 90°. Matches with (4) a = b = c, α = β = γ ≠ 90°.

• Triclinic: a ≠ b ≠ c, α ≠ β ≠ γ ≠ 90°. Matches with (3) a ≠ b ≠ c, α ≠ β ≠ γ ≠ 90°.