Give reasons for the following:

(a) Inert gases do not form ions.

(b) Covalent compounds have a low melting and boiling point.

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)

Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts.

• To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate.
• To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate.

Name:

(a) the cation present and

(b) the anion present in the salt given for identification.

Fill in the blanks by choosing the correct answer from the bracket

(a) Carbon tetrachloride is a …………… [polar / non-polar] covalent molecule.

(b) During electrolysis of acidulated water, the gas liberated at the anode is …………… [oxygen / hydrogen].