Select the right answer from the choices — covalent bond / ionic bond / covalent & coordinate bond for each of the following —

(i) Sodium chloride

(ii) Ammonium ion

(iii) Carbon tetrachloride

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

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

(iii) A molecule of …………… contains a triple bond, [hydrogen, ammonia, nitrogen]

Give reasons — Hydrogen chloride can be termed as a polar covalent compound.

Draw an electron dot diagram of the structure of — hydronium ion. State the type of bonding present in it.