Fill in the blank with the correct choice given in the bracket —

Ionic or electrovalent compounds do not conduct electricity in their …………… state. [fused/solid]

State the meaning of 'lone pair of electrons'. Draw the electron dot diagram of Hydronium ion. [H = 1, O = 8]

Draw the electron dot structure of :

(i) Nitrogen molecule [N=7]

(ii) Sodium chloride [Na=11, Cl=17]

(iii) Ammonium ion [N=7, H=1]

Choose the correct answer from the options given :

A compound with low boiling point is :

1. Sodium chloride
2. Calcium chloride
3. Potassium chloride
4. Carbon tetrachloride