Question

(a) Acids dissolve in water and produce positively charged ions. Draw the structure of these positive ions.

(b) Explain why Carbon tetrachloride does not dissolve in water.

(c) Elements Q and S react together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in ?

(d) Can Q and S, both be metals ? Justify your answer.

(e) The property which is characteristic of an electrovalent compound is that :

A. it is easily vaporized,

B. it has a high melting point,

C. it is a weak electrolyte,

D. it often exists as a liquid.

(f) When a metal atom becomes an ion :

A. it loses electrons and is oxidized,

B. it gains electrons and is reduced,

C. it gains electrons and is oxidized,

D. it loses electrons and is reduced.

Answer 1

(a) $HCl+H_{2}O$ ----> $H3O^{+}$+ $C{l}^{-}$


hydronium ion

(b) CCl4
is a non-polar covalent compound and is not soluble in polar compounds such as H2O.

(c) Solid state

(d) No, formationa of ionic compound needs two different types of elements-One non metal and the other
metal.

(e)

B. it has a high melting point,

(f) A. it loses electrons and is oxidized,