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An ionic compound crystallises in FCC type structure with ‘A’ ions at the centre of each face and ‘B’ ions occupying corners of the cube. The formula of compound is _______.
Concept: Classification of Crystalline Solids
An ionic crystal lattice has limiting value of radius ratio as 0.414 to 0.732; the co-ordination number of its cation is _______.
(A) 6
(B) 4
(C) 3
(D) 12
Concept: Crystal Lattices and Unit Cells
Classify the following solids into different types:
a. Ammonium phosphate
b. Brass
c. S8 molecule
d. Diamond
Concept: Classification of Crystalline Solids
Classify the following solids into different types:
a. Ammonium phosphate
b. Brass
c. S8 molecule
d. Diamond
Concept: Classification of Crystalline Solids
A metal crystallises into two cubic faces namely face centered (FCC) and body centered (BCC), whose unit cell edge lengths are 3.5 Å and 3.0 Å respectively. Find the ratio of the densities of FCC and BCC.
Concept: Calculations Involving Unit Cell Dimensions
Explain with reason sign conventions of ΔS in the following reaction
N2(g) + 3H2(g) → 2NH3(g)
Concept: Number of Atoms in a Unit Cell
Explain with reason sign conventions of ΔS in the following reaction
CO2(g) → CO2(g)
Concept: Number of Atoms in a Unit Cell
Schottky defects are observed in which solid among the following?
(a) Brass
(b) Cesium Chloride
(c) Zinc sulphide
(d) Stainless steel
Concept: Imperfections in Solids - Introduction
A face centred cube (FCC) consists of how many atoms? Explain
Concept: Number of Atoms in a Unit Cell
Which of the following parameters are correct for triclinic lattice?
(A) α = β = γ = 90° and a = b = c
(B) α ≠ β ≠ γ = 90° and a ≠ b ≠ c
(C) α = γ = 90°, β ≠ 90° and a ≠ b ≠ c
(D) α ≠ β ≠ γ ≠ 90° and a ≠ b ≠ c
Concept: Crystal Lattices and Unit Cells
Calculate the number of atoms present in 2 gram of crystal which has face-centred cubic
(FCC) crystal lattice having edge length of 100 pm and density 10 gcm−3
Concept: Crystal Lattices and Unit Cells
What are Frenkel defect
Concept: Imperfections in Solids - Introduction
A pure semiconductor is ________.
(a) an extrinsic semiconductor
(b) an intrinsic semiconductor
(c) p-type semiconductor
(d) n-type semiconductor
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
An ionic crystal lattice has `r^+/r` radius ratio of 0.320, its coordination number is __
(a) 3
(b) 4
(c) 6
(d) 8
Concept: Crystal Lattices and Unit Cells
The density of iron crystal is 8.54-gram cm–3. If the edge length of the unit cell is 2.8 A° and atomic mass is 56 gram mol–1, find the number of atoms in the unit cell. (Given: Avogadro's number = 6.022x1023,1A° = 1x10-8 cm)
Concept: Packing of Particles in Crystal Lattice
Distinguish between p-type and n-type semiconductors.
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure?
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
Distinguish between crystalline solids and amorsphous solids.
Concept: Classification of Crystalline Solids
Distinguish between crystalline solids and amorsphous solids.
Concept: Classification of Crystalline Solids
What is the role of the following compound -
CaF2 in metallurgy of aluminum?
Concept: Introduction to Solid State
