Matrix-Match & Integer Answer Type Questions: The Solid State & Surface Chemistry | JEE Advanced | 35 Years Chapter wise Previous Year Solved Papers for JEE PDF Download

Direction : question contains statements given in two columns, which have to be matched. The statements in Column-I are labelled A, B, C and D, while the statements in Column-II are labelled p, q, r, s and t. Any given statement in Column-I can have correct matching with ONE OR MORE statement(s) in
 Column-II

Qn.

Match the crystal system/unit cells mentioned in Column I with their characteristic features mentioned in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.

Ans:

(A - p, s); (B - p, q); (C - q); (D - q, r).

Solution:

A→ p, s; Parameters of a cubic system are a = b = c and α = β = γ= 90°
 There are three types of lattices in cubic system
 These are simple, Face centred and body centred B→ p, q ; The parameters of a Rhombohedral system are a = b = c; α = β = γ = 90°
 Cubic and Rhombohedral are two crystal systems. There are seven crystal systems in all C→ q; These are two crystal systems.
 D→ q, r; Hexagonal and monoclinic are two crystal systems.
 The parameters of these are
 Hexagonal; a = b ≠ c and α = β = 90°, r = 120°
 Monoclinic ; a ≠ b ≠ c and α = γ = 90°,β ≠ 90°

Integer Value Correct Type Question

Q. The number of hexagonal faces that are present in a truncated octahedron is (2011)

Ans: b