What is F Centre
Consider an expanding sphere of instantaneous radius R whose total mass remains constant. The expansion is such that the instantaneous density 
remains uniform throughout the volume. The rate of fractional change in density 
is constant. The velocity v of any point on the surface of the expanding sphere is proportional to?
What are some examples of ionic bonds?
What are the three main properties of ionic compounds?
What are the characteristics of an ionic bond?
Are ionic bonds good insulators?
Is h20 an ionic compound?
What is the difference between covalent and ionic bonding?
Which one is the strongest bond?
Are ionic or covalent bonds stronger?
What is the weakest type of bond?
How would you describe the electrical charge of an ionic compound?
Which is an example of a metallic bond?
Why is the melting point of magnesium oxide is much higher than sodium chloride?
Why are ionic solids poor conductors of electricity?
Do ionic solids have high melting points?
What are the six properties of ionic compounds?
Are covalent bonds hard and brittle?
Why ionic compounds are solid?
Why are ionic bonds so strong?
Are ionic solids brittle?
Why ionic solids are highly brittle?
Why do ionic compounds tend to be hard and brittle?
What isReason of Ionic solids are hard and brittle ?
What is Difference between crystalline and amorphous solids with one example of each.
Give the significance of a lattice point.
What type of solids are electrical conductors, malleable and ductile?
What is Amorphous solids ?
WHat is Crystalline solids ?
Why do solids have a definite volume?
Why are solids rigid?
Why is glass considered a super cooled liquid?
Refractive index of a solid is observed to have the same value along all directions. Comment on the nature of this solid. Would it show cleavage property?
Classify the following solids in different categories based on the nature of intermolecular forces operating in them: Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.
Solid A is very hard, electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?
In a p-type semiconductor the current is said to move through holes.Explain.
What is Metal Deficiency Defects ?
What is Metal Excess Defects?
What is Non – Stoichiometric Defects ?
What is Interstitial Defect ?
What is Vacancy Defect ?
What is Stoichiometry Defects ?
What is Atomic Imperfections or Point Defects ?
What is H-center defects ?
What is F-center defects
The Frenkel Defect
Explain The Schottky Defect
Which type of defects are known as thermodynamic defects?
Name one solid in which both Frenkel and Schottky defects occur.
Why is Br(V) a stronger oxidant than Sb (V)?