question_answer1) What are pseudo solids?
question_answer2) What is the cause of rigidity in solids?
question_answer3) Which property of glass enables it to be moulded and blown into various shapes?
question_answer4) Which type of intermolecular force is present in non-polar molecular solids?
question_answer5) What are fluids?
question_answer7) What do you mean by imperfections in solid?
question_answer8) What kind of attractive forces are present in the covalent solid?
question_answer10) NaCl crystals when heated in sodium vapours become yellow. Why?
question_answer11) What is a unit cell?
question_answer13) Which types of solids have definite enthalpy of fusion?
question_answer14) Name a salt that can be added to AgCl so as to produce cation vacancy.
question_answer16) What kind of attractive forces are present in the molecular solids?
question_answer17) Name the type of structure of CsCI.
question_answer18) What is the effect of temperature on conduction of semi conductors?
question_answer19) Name a compound in which Frenkel and Schottky defect are present together.
question_answer21) Are ionic solids electrical conductors or insulators?
question_answer22) What are F centres?
question_answer23) Which types of solids are hard and brittle?
question_answer24) What are the properties of ferromagnets. Give an example of ferromagnets.
question_answer25) What is the radius ratio value for tetrahedral void?
question_answer26) What is anisotropy?
question_answer27) Why is Fe3O4 ferrimagnetic at room temperature but becomes conductor at 850 K?
question_answer28) What are primitive and non-primitive unit cells?
question_answer30) What kind of attractive forces are present in the ionic solids?
question_answer31) What is doping? Why is it done?
question_answer32) Define space lattice.
question_answer33) What happens to a sodium chloride structure when high pressure is applied to it?
question_answer34) What kind of attractive forces are present in the metallic solids?
question_answer35) What causes the conduction of electricity by semiconductors?
question_answer36) Which type of intermolecular force is present in polar molecular solids?
question_answer37) What is Frenkel defect?
question_answer39) Zinc oxide is white but becomes yellow-on heating. Why?
question_answer40) What are photovoltaic materials? Give example.
question_answer41) What type of compounds exhibit Schottky defect?
question_answer43) What is the coordination number of octahedral voids?
question_answer44) What is isotropy?
question_answer46) Which type of motion is possible in solid particles?
question_answer48) Why is the Frenkel defect not found in pure alkali metal halides?
question_answer50) Which types of solids are soft and brittle?
question_answer51) What are ferromagnetic substances?
question_answer52) What is point defect?
question_answer54) Which type of intermolecular force is present in ice?
question_answer55) Which type of solids have sharp melting point?
question_answer57) What is mean by (i) 12 - 16 compounds and (ii) 13-15 compounds? Give examples.
question_answer58) Zinc oxide is white but becomes yellow-on heating. Why?
question_answer59) Which types of voids are present in a solid crystal?
question_answer60) Which types of solids are called giant molecules?
question_answer62) What is Schottky defect?
question_answer63) Why there is no change in density of a solid due to Frenkel defect?
question_answer64) How is ferromagnetism different from paramagnetism?
question_answer65) What is the effect on the density of a crystal due to Schottky defect?
question_answer66) How many atoms are present per unit cell of primitive cubic unit cell?
question_answer68) KCl crystals when heated in potassium vapours become violet. Why?
question_answer69) Define ferrimagnetism.
question_answer70) Why is graphite used as lubricant?
question_answer71) Define the term amorphous.
question_answer72) Define radius ratio.
question_answer73) Give two reasons of crystal imperfections.
question_answer76) What types of defect is produced when NaCl is doped with SrCl2?
question_answer77) What is a void? Name any two voids.
question_answer78) Why do solids have definite volume as well as shape?
question_answer79) How will you differentiate between bcc and fee lattice?
question_answer80) Amorphous solids are isotropic. Why?
question_answer81) Ionic solids are insulator of heat and electricity. Why?
question_answer82) State the difference between Schottky and Frenkel defects.
question_answer83) Why are amorphous solids called pseudo solids or super cooled liquids?
question_answer85) Metallic solids are conductors of heat and electricity. Why?
question_answer86) What are crystalline solids?
question_answer88) How will you differentiate between hcp and ccp lattice?
question_answer89) Why is diamond extremely hard and insulator?
question_answer90) What is meant by co-ordination number in a solid?
question_answer91) Crystalline solids are anisotropic. Why?
question_answer92) Molecular solids are soft and brittle. Explain.
question_answer93) How a given material can be made amorphous?
question_answer94) Graphite is conductor of electricity. Given reasons.
question_answer95) What are the differences between crystalline and amorphous solids?
question_answer96) What are the solids? What are their characteristics?
question_answer97) What are covalent solids and what are their characteristics?
question_answer98) What are ionic solids? What are their characteristics?
question_answer99) What are the differences between ionic and metallic solids?
question_answer100) What are the differences between covalent and molecular solids?
question_answer101) What are amorphous and crystalline solids? Give example of each type.
question_answer102) What are structural differences between graphite and diamond?
question_answer104) How are crystalline solids classified? Give example of each type.
question_answer105) What are the differences between ionic and metallic solids?
question_answer106) Why has 'second' been
defined in terms of periods of radiation from Cesium-133?
question_answer107) Derive the SI unit of joule (J) in terms of fundamental units.
question_answer108) What is a coherent system of
units?
question_answer109) Do AU and \[{{\text{A}}^{\text{o}}}\] represent the same unit of length?
question_answer110) What is the difference between
nm, mN, Nm?
question_answer111) Will five litres of benzene
weigh more in summer or winter? Comment.
question_answer113) Which type of phenomenon can be
used as a measure of time? Give three examples.
question_answer122) Is the time variation of position shown in Fig.
1(b).5 observed in nature?
question_answer127) Energy density and pressure have
the same dimensions. Comment.
question_answer135) Justify L + L = L and L ? L = L
question_answer136) How many ergs are there in 1 kilo
watt hour?
question_answer138) Which quantity, in a given formula should be measured most accurately?
question_answer139)
'Problems with accuracy are due to errors'. Is the statement true?
question_answer141) 'Poor accuracy involves errors that can often be corrected'. Do you agree?
question_answer142) 'A lack of precision is due to limitation of measuring instrument'. Is
it true?
question_answer145) What is the difference between 5.0 and 5.00?
question_answer169) Why was science called natural
philosophy in earlier days?
question_answer171) What contribution has Physics
made in the development of biological sciences?
question_answer172) Why is the cylinder used in
defining kg made of platinum indium alloy?
question_answer173) Which of these is largest:
astronomical unit, light year and par sec?
question_answer174) Name three units which can be
used for measuring large masses.
question_answer175) Which unit can be used for measurement
of very small masses?
question_answer176) How many a.m.u. make 1 kg?
question_answer177) What is common between bar and
torr?
question_answer178) For
a given base line, will a distant star show greater parallax or a near star?
question_answer181) What
is the technique used for measuring large time intervals?
question_answer183) Give two examples each of
dimensionless constants and dimensional variables.
question_answer184) Can a quantity have constant
value and be dimensionless?
question_answer185) Give three examples of
dimensionless variables.
question_answer186) Pressure is defined as momentum
per unit volume. Is it true?
question_answer192) Energy and Young's modulus have
the same dimensions, comment.
question_answer201) Subtraction of two nearly equal quantities destroys the accuracy.
Comment.
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