question_answer1) What are fluids?
question_answer2) What is the cause of rigidity in solids?
question_answer3) What kind of attractive forces are present in the molecular solids?
question_answer4) What kind of attractive forces are present in the ionic solids?
question_answer5) What kind of attractive forces are present in the covalent solid?
question_answer6) What kind of attractive forces are present in the metallic solids?
question_answer7) Are ionic solids electrical conductors or insulators?
question_answer8) What are pseudo solids?
question_answer9) What is isotropy?
question_answer10) What is anisotropy?
question_answer11) Which type of solids have sharp melting point?
question_answer12) Which type of solids have definite enthalpy of fusion?
question_answer14) What is photovoltaic materials? Give example.
question_answer15) Which type of intermolecular force is present in non-polar molecular solids?
question_answer16) Which type of intermolecular force is present in polar molecular solids?
question_answer17) Which type of intermolecular force is present in ice?
question_answer18) Which type of solids are hard and brittle?
question_answer19) Which type of solids are soft and brittle?
question_answer20) Which type of solids are called giant molecules?
question_answer21) Which type of motion is possible in solid particles?
question_answer22) Which property of glass enables it to be moulded and blown into various shapes?
question_answer23) What is a unit cell?
question_answer24) Define space lattice.
question_answer25) What are primitive and non-primitive unit cells?
question_answer26)
How
many atoms are present per unit cell of primitive cubic unit cell?
question_answer32)
Which
type of voids are present in a solid crystal?
question_answer33)
What
is the radius ratio value for tetrahedral void?
question_answer36)
What
is the coordination number of octahedral voids?
question_answer40)
What
happens to a sodium chloride structure when high pressure is applied to it?
question_answer44)
Name
the type of structure of CsCI.
question_answer45)
What
do you mean by imperfections in solid?
question_answer46)
What
is point defect?
question_answer47)
What
is Frenkel defect?
question_answer48)
What
is Schottky defect?
question_answer49)
Which
point defect lowers density of solid?
[AI
2000, Delhi 2004]
question_answer50)
What
type of compounds exhibit Schottky defect?
question_answer51)
What
is the effect on the density of a crystal due to Schottky defect?
question_answer52)
Name
a compound in which Frenkel and Schottky defect are present together.
question_answer53)
Why
is the Frenkel defect not found in pure alkali metal halides?
question_answer54)
Zinc
oxide is white but becomes yellow-on heating. Why?
question_answer55)
NaCl
crystals when heated in sodium vapours become yeltew Why?
question_answer56)
KCl
crystals when heated in potassium vapours become violet Why?
question_answer57)
What
are F centres?
question_answer58)
Why
there is no change in density of a solid due to Frenkel defect?
question_answer59)
Mention
one property which is caused due to the presence of F
centres [2003]
question_answer60)
Name
a salt that can be added to AgCl so as to produce cation vacancy.
question_answer61)
What
are ferromagnetic substances?
question_answer62)
What
is doping? Why is it done?
question_answer67)
What
is the effect of temperature on conduction of semi conductors?
question_answer68)
How
is ferromagnetism difCereaffl-om paramagnetism?
question_answer69)
Define
ferrimagnetism.
question_answer70)
What
happens when ferrimagnetic 
is heated at
850 K and Why? [AI 2004]
question_answer72)
What
is mean by (i) 12 - 16 compounds and (ii) 13-15 compounds. Give examples.
question_answer73)
Why
is ferrimagnetic at room
temperature but becomes conductor at 850 K?
question_answer77)
What
are the properties offerromagnets. Give an example offerromagnet.
question_answer79)
Why
do solids have definite volume as well as shape?
question_answer80)
What
are crystalline solids?
question_answer81)
Define
the term amorphous.
question_answer82)
Why
are amorphous solids called pseudo solids or super cooled liquids?
question_answer83)
Crystalline
solids are anisotropic. Why?
question_answer84)
Amorphous
solids are isotropic. Why?
question_answer85)
Metallic
solids are conductors of heat and electricity. Why?
question_answer86)
How
a given material can be made amorphous?
question_answer87)
Why
is graphite used as lubricant?
question_answer88)
Graphite
is conductor of electricity. Given reasons.
question_answer89)
Why
is diamond extremely hard and insulator?
question_answer90)
Ionic
solids are insulator of heat and electricity. Why?
question_answer91)
Molecular
solids are soft and brittle. Explain.
question_answer94)
What
is a void? Name any two voids.
question_answer95)
What
is meant by co-ordination number in a solid?
question_answer96)
Define
radius ratio.
question_answer98)
How
will you differentiate between bcc and fee lattice?
question_answer99)
How
will you differentiate between hcp and ccp lattice?
question_answer102)
What
types of defect is produced when Nad is doped with 
?
question_answer105)
Give
two reasons of crystal imperfections.
question_answer106)
State
the difference between Schottky and Frenkel defects.
question_answer107)
Which
of the two changes the density of solid?
question_answer109)
]
What
are the solids? What are their characteristics?
question_answer110)
What
are amorphous and crystalline solids? Give example of each type.
question_answer111)
How
are crystalline solids classified? Give example of each type.
question_answer112)
What
are ionic solids? What are their characteristics?
question_answer113)
What
are metallic solids? What are their characteristics?
question_answer114)
What
are covalent solids and what are their characteristics?
question_answer116)
What
are structural differences between graphite and diamond?
question_answer117)
What
are the differences between ionic and metallic solids?
question_answer118)
What
are the differences between covalent and molecular solids?
question_answer119)
What
are the differences between crystalline and amorphous solids?
question_answer121) Urea has a sharp melting point but glass
does not. Explain.
question_answer124) Distinguish between crystal lattice and
unit cell.
question_answer126) Gas lighter when pressed produces flame.
Explain.
question_answer130) Why is common salt sometimes yellow
instead of being white?
question_answer131) Why are defects in the crystalline
solids called thermodynamic defects?
question_answer133) Cesium chloride is more stable than
sodium chloride. Assign reason.
question_answer134) Why is diffusion in solids less as
compared to the liquids?
question_answer135) How will you show that glass is a super
cooled liquid?
question_answer136) The melting point of sodium chloride is
more than that of sodium. Justify.
question_answer140) Why does zinc oxide which is white in
colour become yellow upon heating?
question_answer144) Frenkel defect is not found in the
halides of alkali metals. Assign reason.
question_answer149)
Why
does zinc oxide which is white in colour become yellow upon heating?
question_answer153)
The
melting point of sodium chloride is more than that of sodium. Justify.
question_answer154)
How
will you show that glass is a super cooled liquid?
question_answer155)
Why
is diffusion in solids less as compared to the liquids?
question_answer157)
Urea
has a sharp melting point but glass does not. Explain.
question_answer159)
Cesium
chloride is more stable than sodium chloride. Assign reason.
question_answer161)
Why
are defects in the crystalline solids called thermodynamic defects?
question_answer162)
Why
is common salt sometimes yellow instead of being white?
question_answer166)
Gas
lighter when pressed produces flame. Explain.
question_answer168)
Distinguish
between crystal lattice and unit cell.
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