Ionic solids which have anionic vacancies due to metal excess defect develop colour. Explain with the help of a suitable example.

Explain with the help of a suitable example polar covalent bond.

Presence of excess Sodium makes NaCl crystal coloured. Explain on the basis of crystal defects.

Presence of excess sodium makes NaCl crystal coloured. Explain on the basis of crystal defects.

Redox reactions are those in which oxidation and reduction takes places. Explain the different types of redox reactions with suitable examples

Assertion (A) :KCl is more likely to show Schottky defect, while Lil is more likely to show Frenkel defect. Reason(R): Schottky defects is more likely in ionic solids in which cations and anions are of comparable size while Frenkel defect is more likely in which cations and anions have large differences in their ionic sizes.

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. Give an example.

Reagents which attack organic compounds may be classified as electrophiles, nucleophiles and free radicals. Explain nucleophiles and electrophiles with suitable examples.

Even crystal, the substance which we consider as the most perfect solid, shows some defects or imperfections. Explain the law.

Due to Frenkel defect, the density of the ionic solids