Home
Class 12
CHEMISTRY
Give reasons : (i) In stoichiometric d...

Give reasons :
(i) In stoichiometric dfects. NaCl exhibits Schottky defect and not Frenkel defect.
(iii) Ferrimagnetic substances show better magnetism than antiferromagnetic substances.

Text Solution

Verified by Experts

(i) Since there is only a small difference in the raddi of `Na^(+)` and `Cl^(-)` ions, NaCl exhibits Schottky and not Frenkel defect
Promotional Banner

Similar Questions

Explore conceptually related problems

(a) Calculate the number of unit cell in 8.1g of aluminium if it crystallises in a fcc structure. (Atomic mass of Al = 27 g*mol^(-1) ) (b) Give reasons: (i) In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect. (ii) Silicon on doping with Phosphorous forms n-type semiconductor. (iii) Ferrimagnetic substances show better magnetism than anti-ferromagnetic substances.

(a) Based on the nature of intermolecular forces, classify the following solids: Sodium sulphate, Hydrogen. (b) What happens when CdCl_(2) is doppd with AgCl? ( c) Why do ferrimagnetic substances show better magnetism than antiferromagnetic substances?

Explain the following terms with suitable examples: (i) Schottky defect (ii) Frenkel defect (iii) Interstitials and (iv) F-centre.

Define: (i) ferromagnetic (ii) ferrimagnetic and (iii) anti-ferromagnetic substance. Give one example of each substance.

Which of the following point defect are shown by AgBr crystals: (i) Schottky defect (ii) Frenkel defect (iii) Metal excess defect (iv) Metal deficiency defect-

What is stoichiometric defect? What kind of defects are Schottky and Frenkel defects? Which one of these two defects is associated with decrease in density of the crystal, and which one is associated with no change in density? Give reasons.

Which of the following point defects are shown by AgBr_((s)) crystals ? (I)Schottky defect (II)Frenkel defect (III)Metal excess defect (IV) Metal deficiency defect

Which of the following substances can exist in a permanently magnetised state even when the magnetic field is removed, and why? (i) Paramagnetic (ii) Ferromagnetic (iii) Ferrimagnetic

(a) A crystalline compound formed by element A and B has face-centred cubic unit cell. The corners and the face centres are occupied by A and B atoms respectively. If one of the corner atoms is found missing then what would be the formula of the compound? (b) Give an example of a compound which exhibits both Schottky and Frenkel defects.

(a) Based on the nature of intermolecular forces, classify the following solids: Benzene, Silver. (b) AgCl shows Frenkel defect while NaCl does not. Give reason. ( c) What type of semiconductor is formed when Ge is doped with Al?