Advertisements
Advertisements
Calculate the packing efficiency for bcc lattice.
Concept: Packing Efficiency
The unit cell of Na is bcc and its density is 0.97 g/cm3. What is the radius of a sodium atom if the molar mass of Na is 23 g/mol?
Concept: Crystal Structure
Derive the relationship between density of substance, its molar mass, and the unit cell edge length. Explain how you will calculate the number of particles, and a number of unit cells in x g of metal.
Concept: Cubic System
The coordination number of atoms in body-centred cubic structure (bcc) is ______.
Concept: Cubic System
Write the consequences of Schottky defect with reasons.
Concept: Crystal Defects or Imperfections
Explain metal deficiency defect with examples.
Concept: Crystal Defects or Imperfections
Aluminium crystallises in a cubic close-packed structure with a unit cell edge length of 353.6 pm. What is the radius of Al atom? How many unit cells are there in 1.00 cm3 of Al?
Concept: Packing of Particles in Crystal Lattice
An element has a bee structure with unit cell edge length of 288 pm. How many unit cells and number of atoms are present in 200 g of the element?
Concept: Cubic System
Name a compound where Frenkel defect is found.
Concept: Crystal Defects or Imperfections
The relation between the radius of the sphere and the edge length in the body-centred cubic lattice is given by the formula ______.
Concept: Packing Efficiency
Explain the following term:
Substitutional impurity defect
Concept: Crystal Defects or Imperfections
Explain the following term:
Interstitial impurity defect
Concept: Crystal Defects or Imperfections
Silver crystallizes in the fcc structure. If the edge length of the unit cell is 400 pm, calculate the density of silver (Atomic mass of Ag = 108).
Concept: Cubic System
The number of particles present in Face Centred Cubic Unit cell is/are ______.
Concept: Cubic System
Predict the type of cubic lattice of a solid element having edge length of 400 pm and density is 6.25 g/ml.
(Atomic mass of element = 60)
Concept: Packing of Particles in Crystal Lattice
Write the formula to determine the molar mass of a solute using freezing point depresssion method.
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
The vapour pressure of pure benzene is 640mm og Hg. 2.175×10-3kg of non-vloatile solute is added to 39 gram of benzene the vapour pressure of solution is 600mm of HG. Calculate molar mass of solute.
[C = 12, H = 1]
Concept: Colligative Properties and Determination of Molar Mass - Introduction
Why is molality of a solution independent of temperature?
Concept: Expressing Concentration of Solutions
The determination of molar mass from elevation in boiling point is called as
- cryoscopy
- colorimetry
- ebullioscopy
- spectroscopy
Concept: Colligative Properties and Determination of Molar Mass - Introduction
Colligative property depends only on ........................ in a solution.
Concept: Colligative Properties and Determination of Molar Mass - Introduction
