What are impurity defects ? Explain.

What are non-stoichiometry defects in crystals ? Explain.

What are point defects in crystals ? Describe the Schottky defects in crystals.

In the crystallisation of 71.75 grams of AgCl , in molten state 1 xx 10^(4) mole of cadmium chloride is added to cause impurity defect. Calculate (a) the number of Ag^+ ions present, (b) the number of Cd2+ ions present and (c) the number of lattice vacancy defects.

which of the following statement are not true ? (a) Vacancy defect results in a decrease in the density of the substance (b)interstitial defects results in an increase in the density of the substance (c)impurity defect has no effect on the density of the substance (d)Frenkel defect results results in an increase in the density of the substance

What possible impurities does rain water contain ?

What are metal excess defects in crystals ? How are these caused ?

What is meant by mass defect?

Defects are basically irregularities in the arrangement of constituent particles. Broadly speaking the defects are of two types. Namely point defects and line defects. Point defects: The irregularities or deviations from ideal arrangement around a point or an atom in the crystalline substance. Line defects : The irregularities or deviations from ideal arrangement in enitre row of lattice points. Answer the following questions. Select the correct statements : (i) Frenkel defect create a vacancy defect at its original site and an interstitial defect at its new position. (ii) Frenkel defect is stoichiometric point defect. (iii) Frenkel defect is alos called dislocation defect. (iv) Silver halide shows Frenkel defect.

What type of stoichiometric defect is shown by NaCl ? Explain.