Fill in the blanks by selecting the correct word from the brackets :

(a) When the nuclei of two different reacting atoms are of …………… mass, then a bond so formed is called …………… covalent bond (equal, unequal, polar, non-polar).

(b) In case of non-polar covalent bond, the covalent bond is formed in the …………… of atoms and shared electrons are distributed (corner, middle, equally, unequally).

(c) Ionic or electrovalent compounds do not conduct electricity in their …………… state (fused/solid).

(d) The ions in …………… compounds are held very strongly due to strong …………… forces (electrovalent, covalent, electromagnetic, electrostatic).

(e) In covalent compounds, the bond is formed due to …………… [sharing/transfer] of electrons.

(f) Electrovalent compounds have a …………… [low/high] boiling point.

Give one word or phrase for the following :

(a) Formation of ions from molecules.

(b) A bond formed by a shared pair of electrons with both electrons coming from the same atom.

(c) A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.

Give an example in each of the following :

(a) Co-ordinate bond compound,

(b) Solid covalent compound,

(c) Gaseous polar covalent compound,

(d) Gaseous non polar covalent compound,

(e) Liquid non polar covalent compound,

(f) Compound with electrovalent and covalent bond,

(g) Compound with all three types of bonds.

Electrons are getting added to an element Y :

(i) is Y getting oxidized or reduced ?

(ii) which electrode will Y migrate to during the process of electrolysis ?