In which of the following compounds is the bonding essentially ionic in which is the bonding essentially covalent, and in which are both types of bonding represented ?
(i) `C_(2)H_(5)OH` (ii) `NaBr` (iii) `Ba(CN)_(2)` (iv) `(NH_(4))_(2)S` (v) `PCI_(3)`
(b) Write the formula for a compound of `CI` which contains (i) Ionic bonds only (ii) Ionic and covalent bonds and (iii) Covalent bonds only
(c ) Covalent bonds are called directional while ionic bonds are called non-directional Explain .

Explanation

(i) Covalent (ii) Ionic (iii) Both (iv) Both (v) Covalent
(b) One possible for each (i) NaCI (ii) NaCIO (iii) `NCI_(3)` (c ) Covalent bonds are directional because it is formed by the overlap of hybridised orbitals which is also directional .