Frenkel Defect
Trending Questions
Q. what is the difference between hydration and lattice enthalpy ? what are their applications ? are they both exothermic
Q. 5. In fcc lattice of NaCl structure , if the diameter of Na+ is=x, and the redius of Cl - is y, then what is the edge length of NaCl in the crystal ?
Q. why does the thermal stability increses down the grp in case of alkaline earth metal
Q. What is electronegativity and ionic mobility and tell about trend of ionic mobility in alkali metals
Q. Arrange the following in decreasing order of lattice enthalpy:
i) Li2O, BeO, B2O3
ii) AlF3, Al2O3, AlN
iii) CsF, CsCl, CsBr, CsI
Q. White ZnO (s) becomes yellow upon heating due to
- Addition of electrons
- Creation of Frenkel defect
- Creation of F-centers
- All of the above
Q. 18. Structure of a mixed oxide is cube closed pack(ccp).The cubic unit of mixed oxide is composed of oxide ions.one forth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids by a monovalent metal B.The fomula of the oxide is 1)ABO2 2)A2BO2 3)A2B3O4 4)AB2O2
Q. Two metal plates A and B are soldered together ad in fug. A=100cm^2, x1=x2=4mm, T1=120°C, T2=0°C. Thermal conductivity of A and B are 50 and 80 W/mK. The temperature of the soldered junction is
Q. structure of a mixed oxide is cubic closed packed. the unit cell of mixed oxide is composed of oxide iond. one fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are oupied by monovalent metal B. the formula of oxide is
Q. Which one of the following crystals does not exhibit Frenkel defect
- AgBr
- AgCl
- KBr
- ZnS
Q. AB has ZnS type structure. What will be interionic distance between A+ and B- if lattice constant of AB is 200pm?