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The major binding force in diamond is_______________ .
(a) Covalent bond
(b) Ionic bond
(c) Metallic bond
(d) Co-ordinate covalent bond
Concept: Classification of Crystalline Solids
Describe triclinic crystal lattice with the help of a diagram.
Concept: Crystal Lattices and Unit Cells
A unit cell of iron crystal has edge length 288 pm and density 7.86 g.cm-3. Find the number of atoms per unit cell and type of the crystal lattice.
Given : Molar mass of iron = 56 g.mol-1; Avogadro's number NA = 6.022 x 1023.
Concept: Number of Atoms in a Unit Cell
What is the covalency of nitrogen in N2O5?
Concept: Classification of Crystalline Solids
What is the covalency of nitrogen in N2O5?
Concept: Classification of Crystalline Solids
What type of semiconductor is obtained when silicon is doped with boron?
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
What type of magnetism is shown in the following alignment of magnetic moments?
Concept: Properties of Solids: Magnetic Properties
What type of point defect is produced when AgCl is doped with CdCl2?
Concept: Imperfections in Solids - Introduction
In body centred cubic structure the space occupied is about
(A) 68% (B) 53%
(C) 38% (D) 32%
Concept: Packing Efficiency >> Efficiency of Packing in Body-centred Cubic Structures
Gold occurs as face centred cube and has a density of 19.30 kg dm-3. Calculate atomic radius of gold. (Molar mass of Au = 197)
Concept: Number of Atoms in a Unit Cell
Face centred cubic crystal lattice of copper has density of 8.966 g.cm-3. Calculate the volume of the unit cell. Given molar mass of copper is 63.5 g mol-1 and Avogadro number NA is 6.022 x 1023 mol-1
Concept: Number of Atoms in a Unit Cell
To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons:
(a) 2
(b) 3
(c) 4
(d) 5
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
When a hole is produced in P-type semiconductor, there is _______.
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
Give an example each of a molecular solid and an ionic solid.
Concept: Classification of Crystalline Solids
Give an example each of a molecular solid and an ionic solid.
Concept: Classification of Crystalline Solids
An element crystallises in a b.c.c lattice with cell edge of 500 pm. The density of the element is 7.5g cm-3. How many atoms are present in 300 g of the element?
Concept: Number of Atoms in a Unit Cell
An element with density 10 g cm−3 forms a cubic unit cell with edge length of 3 × 10−8 cm. What is the nature of the cubic unit cell if the atomic mass of the element is 81 g mol−1?
Concept: Calculations Involving Unit Cell Dimensions
How will you distinguish between the following pair of terms?
Tetrahedral and octahedral voids
Concept: Close Packed Structures - Formula of a Compound and Number of Voids Filled
How will you distinguish between the following pair of terms?
Crystal lattice and unit cell
Concept: Crystal Lattices and Unit Cells
Which stoichiometric defect does not change the density of the crystal?
Concept: Imperfections in Solids - Introduction
