Definitions [4]
Define unit cell.
A basic repeating structural unit of a crystalline solid is called a unit cell.
Define Anisotropy.
The ability of crystalline solids to change values of physical properties when measured in different directions is called anisotropy.
Define the term ‘amorphous’.
The solids which do not possess the repeating ordered arrangement of atoms or ions are called amorphous solids.
Define the following term:
Ferromagnetism
Ferromagnetism is defined as the phenomenon in which substances, such as iron, cobalt and nickel, are strongly attracted by a magnetic field. Such substances are called ferromagnetic substances.
Theorems and Laws [1]
Name the law or principle to which the following observations confirm:
When 9650 coulombs of electricity is passed through a solution of copper sulphate, 3.175 g of copper is deposited on the cathode (at. wt. of Cu = 63.5).
Faraday’s first law of electrolysis: The mass of a substance deposited or liberated at an electrode is directly proportional to the quantity of electricity passed through the electrolyte.
Given: Charge passed = 9650 C
Atomic mass of Cu = 63.5
Valency of Cu in CuSO4 = 2
Equivalent mass of Cu = `63.5/2` = 31.75
Now, Mass deposited = `9650/96500 xx 31.75`
= 0.1 × 31.75
= 3.175 g
Important Questions [41]
- What is the Role of the Following Compound - Caf2 in Metallurgy of Aluminium ?
- Define Anisotropy.
- Classify the Following Solids into Different Types
- The Major Binding Force in Diamond is
- Classify the Following Molecular Solids into Different Types: Hcl Co2 Solid Ice So2
- Define unit cell.
- Distinguish Between Crystalline Solids and Amorsphous Solids.
- Explain ionic solids are hard and brittle.
- 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
- What is the Hybridisation of Carbon Atom in Diamond and Graphite?
- The Relation a ≠ b ≠ c and α ≠ β ≠ γ Represents Which Crystal System?
- Which of the Following Parameters Are Correct for Triclinic Lattice?
- 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
- An Ionic Crystal Lattice Has Limiting Value of Radius Ratio as 0.414 to 0.732; the Co-ordination Number of Its Cation is
- An Ionic Crystal Lattice Has `R^+/R` Radius Ratio of 0.320, Its Co-ordination Number is __
- Describe triclinic crystal lattice with the help of a diagram.
- 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.
- Silver crystallises in FCC structure. If density of silver is 10.51 gcm-3, calculate the volume of unit cell.
- Represent a Cell Consisting of Mg2+ | Mg Half Cell and Ag+ | Ag Half Cell and Write the Cell Reaction.
- Niobium Crystallises as Body Centred Cube (Bcc) and Has Density of 8.55 Kg / Dm-3 . Calculate the Attomic Radius of Niobium.
- In Body Centred Cubic Structure the Space Occupied is About
- 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.
- How many atoms constitute one unit cell of a face-centered cubic crystal?
- 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)
- Face centred cubic crystal lattice of copper has density of 8.966 g.cm-3. Calculate the volume of the unit cell.
- Explain with reason sign conventions of ΔS in the following reaction N2(g) + 3H2(g) → 2NH3(g)
- Explain with reason sign conventions of ΔS in the following reaction CO2(g) → CO2(g)
- Face Centred Cube (Fcc) Consists of How Many Atoms? Explain
- The Density of Silver Having an Atomic Mass of 107.8 G Mol- 1 is 10.8 G Cm-3. If the Edge Length of Cubic Unit Cell is 4.05 × 10- 8 Cm, Find the Number of Silver Atoms in the Unit Cell.
- Number of Types of Orthorhombic Unit Cell is ___________.
- What Are Frenkel Defect
- Define the Following Term Schottky Defect
- Explain Impurity Defect in Stainless Steel with Diagram
- Schottky Defects Are Observed in Which Solid Among the Following?
- Pyrolusite Ore is _______.
- Define the following term: Ferromagnetism
- What is ferromagnetism?
- Iron (z=26) is highly ferromagnetic. Explain.
- What is the Ratio of Octahedral Holes to the Number of Anions in Hexagonal Closed Packed Structure?
- P - type semi-conductors are made by mixing silicon with impurities of ______.
- To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons
Concepts [14]
- Introduction to Solid State
- Classification of Crystalline Solids
- Amorphous and Crystalline Solids
- Crystal Lattices and Unit Cells
- Calculations Involving Unit Cell Dimensions
- Close Packed Structures of Solids
- Efficiency of Packing in Body-centred Cubic Structures
- Close Packed Structures - Formula of a Compound and Number of Voids Filled
- Number of Atoms in a Unit Cell
- Imperfections in Solids - Introduction
- Properties of Solids: Magnetic Properties
- Band Theory of Metals
- Properties of Solids: Electrical Properties
- Applications of n-type and p-type Semiconductors
