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प्रश्न
Define Anisotropy.
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उत्तर
The ability of crystalline solids to change values of physical properties when measured in different directions is called anisotropy.
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संबंधित प्रश्न
What type of solids are electrical conductors, malleable and ductile?
Explain the basis of similarities between metallic and ionic crystals.
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 _______.
Distinguish between crystalline solids and amorsphous solids.
Account for the following :
o-nitrophenol is more steam volatile than p-nitrophenol.
Answer the following in one or two sentences.
A solid is hard, brittle and electrically nonconductor. Its melt conducts electricity. What type of solid is it?
Classify the following solid:
Pb
A compound crystallizes in bcc structure. What is unit cell edge length if diameter of its atom is 120 pm?
Classify the following solid.
Brass
Classify the following solid.
Iodine
Which of the following is an example of molecular solid?
____________ is an example of molecular crystal.
Which among the following is NOT a polar molecular solid?
Which among the following is not true for crystalline solid?
Which among the following is an example of network solid?
What type of interaction hold the molecules together in a polar molecular solid?
Ionization enthalpy is lowest in ____________.
London forces are present in ____________.
MgO has the structure of NaCl. The coordination number of the ions in MgO is ____________.
An AB2 type structure is found in ____________.
In graphite electrons are ____________.
Inspite of long range order in the arrangement of particles why are the crystals usually not perfect?
A crystal with a ≠ b ≠ c and α = β = γ = 90° is
Who introduced the term covalent bond?
The major binding force in diamond, silicon and quartz is ______.
Graphite is a ______.
What are intermolecular forces of attraction involved in molecular crystals?
Quartz is which type of crystal?
