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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
1.0 x10-3Kg of urea when dissolved in 0.0985 Kg of a solvent, decreases freezing point of the solvent by 0.211 k. 1.6x10 Kg of another non-electrolyte solute when dissolved in 0.086 Kg of the same solvent depresses the freezing point by 0.34 K. Calculate the molar mass of the another solute. (Given molar mass of urea = 60)
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
The substance ‘X’, when dissolved in solvent water gave molar mass corresponding to the molecular formula ‘X3’. The van’t Hoff factor (i) is _______.
(A) 3
(B) 0.33
(C) 1.3
(D) 1
Concept: Abnormal Molar Masses
A solution of glucose in water is labelled as 10% (W/W).
Calculate:
a. Molality
b. Molarity of the solution.
[Given: Density of solution is 1.20 g mL-1 and molar mass of glucose is 180 g mol-1 ]
Concept: Colligative Properties and Determination of Molar Mass - Introduction
The boiling point of water at high altitude is low. because________________ .
(a) the temperature is low.
(b) the atmospheric pressure is low.
(c) the temperature is high.
(d) the atmospheric pressure is high
Concept: Solubility >> Solubility of a Solid in a Liquid
