(i)

From the above reactions X or Y, identify the reaction which exhibits;
(a) electrolytic dissociation
(b) ionization

(ii) Give reasons for the following:
(a) Inert gases do not form ions.
(b) Covalent compounds have a low melting and boiling point.

(iii) Arrange the following as per the instructions given in the brackets:
(a) Carbon, Fluorine, Beryllium (decreasing order of atomic size)
(b) Sulphuric acid, Phosphoric acid, Acetic acid (increasing order of number of replaceable H atoms per molecule)
(c) Potassium, Lithium, Sodium (increasing order of ionization potential)

(iv) Identify the following:
(a) An element in period 1 which can be placed in both group 1 and group 17 of the Periodic Table.
(b) The element having electronic configuration 2, 8, 6.
(c) The most electronegative element of period 3.

Solution

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