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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
Which stoichiometric defect decreases the density of the crystal?
Concept: Imperfections in Solids - Introduction
Explain ionic solids are hard and brittle.
Concept: Classification of Crystalline Solids
Explain ionic solids are hard and brittle.
Concept: Classification of Crystalline Solids
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
