Question

Give reasons: (i) Ionic compounds have high melting points. (ii) Ionic compounds are hard crystalline solids. (iii) Ionic compounds dissolve in water

Answer 1

(1) the dissociation energy of ionic compounds high so the melting point is high.

(2) the intermolecular force of attraction is high which helps the compounds to attain hard crystalline solid shape.

(3) the difference in electronegativity helps the compounds to make a hydrogen bond and hence ionic compounds dissolve in water.

Answer 2

(1) disociation of ionic compounds is high
So they have high melting point

(2) intermolecular force of attraction is very high
So they helps the compound to attain the shape of hard crystalline solids

(3) differenece in electronegativity helps compounds to form hydrogen bond so they dissolve In water