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

Give a reason why covalent compounds exist as gases, liquids or soft solids?

There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively. Give the molecular formula of the compound formed between E and G and state the type of chemical bond in this compound.

A compound is formed between atoms A and B. The electronic configuration of A is 2,8,1 and B is 2,6.

(a) Write the equation of the formation of ions of A and B.

(b) Why do A and B form ions?

(c) Which of the following can form a compound?
    (i) A and A (ii) A and B (iii) B and B
    Also state the type of bonding present in the compound

(d) If A and B combines, which of them will get oxidised?

(e) Draw an electron dot diagram of the ionic compound formed in part (c).

(f) Write the formula of the compound formed in part (c) which has a
    (i) high melting and boiling point
    (ii) gaseous compound
    (iii) good conductor of electricity in molten state.