What makes the alkali metal halides sometimes coloured which are otherwisevcolourless?
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0
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2947
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September 20, 2016
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Give an example of ionic compound which shows Schottky defect
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0
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630
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September 20, 2016
|
What is the effect of Frenkel defect on electrical conductivity of solid?
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0
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2216
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September 20, 2016
|
Why is the Frenkel defect not found in pure alkali metal halides?
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0
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1242
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September 20, 2016
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What is the effect on the density of a crystal due to Schottky defect?
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0
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1811
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September 20, 2016
|
Name the type of point defect that occurs in a crystal of zinc sulphide
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0
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3291
|
September 20, 2016
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What type of stoichiometric defect is shown by (i) ZnS? (ii) AgBr?
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0
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887
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September 20, 2016
|
Which stoichiometric defect in crytals, increases the density of a solid?
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0
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1495
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September 20, 2016
|
What type of defect will arise when a solid is heated? Which physical property is affected by it and in what way?
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0
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707
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September 20, 2016
|
Aluminium crystallises in a cubic closed packed structure
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1
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1047
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September 20, 2016
|
An element occurs in bcc structure. It has a cell
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1
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5524
|
September 20, 2016
|
An element crystallises in fee lattice having edge length 400 pm
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1
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2128
|
September 20, 2016
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If the radius of the octahedral void is r and radius of the atoms in close packing is R, derive a relation
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1
|
11279
|
September 20, 2016
|
Copper crystallises into a fee lattice with edge
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1
|
718
|
September 20, 2016
|
An element with density 2.8 g c${{m}^{-3}}$ forms an fee unit cell with edge length
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1
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1937
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September 20, 2016
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Ferric oxide crystallises in a hexagonal close
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1
|
663
|
September 20, 2016
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What is the coordination number of atoms
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1
|
816
|
September 20, 2016
|
An alloy of gold and cadmium crystallises with a cubic structure in which gold atoms occupy the corners and cadmium atoms fit into the face centres. Assign formula for this alloy
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0
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11668
|
September 20, 2016
|
A cubic solid is made up of two elements P and Q
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1
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5206
|
September 20, 2016
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Explain, how much portion of an atom
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1
|
1223
|
September 20, 2016
|
Aluminium crystallises in a fee structure. Atomic radius of the metal is 125 pm. What is the length of the side of the unit cell of the metal?
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0
|
477
|
September 20, 2016
|
Which of the following lattices has the highest packing efficiency?
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1
|
934
|
September 20, 2016
|
What happens to a sodium chloride structure when high pressure is applied to it?
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0
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2119
|
September 20, 2016
|
What is the coordination number of each type of ions in a rock salt type crystal structure?
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0
|
2500
|
September 20, 2016
|
A compound is formed by two elements ‘M and ‘N. The element forms ‘ccp’ and atoms of ‘M occupy l/3rd of tetrahedral voids. What is the formula of the compound?
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0
|
484
|
September 20, 2016
|
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids?
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0
|
1800
|
September 20, 2016
|
What makes a glass different from a solid such as quartz? Under whal conditions could quartz be converted into glass?
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0
|
606
|
September 20, 2016
|
What is the maximum radius of a sphere that can be filled in a tetrahedral void of cubic close packing of spheres of radius R without disturbing the packing?
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0
|
1726
|
September 20, 2016
|
What is the two dimensional coordination number of a molecule in square close-packed layer?
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0
|
753
|
September 20, 2016
|
How many atoms constitute one unit cell of a face-centred cubic crystal?
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0
|
2833
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September 20, 2016
|