Question

find the odd one out. chloride ion, calcium ion, sulphide ion, oxide ion

Answer 1

Calcium ion because it is a metal and have positive charge.

Chloride ion can also be odd one out because it has one unit charge and rest of them has two unit charge.

Hope this will help you...

Answer 2

Chloride ion is the odd one out in the given series.  

Out of chloride ion, calcium ion, sulphide ion, and oxide ion. Chloride ion is the odd one out.

The reason behind it is that chloride ion comprises of one unit charge and rest of the given elements in the series comprises two unit charge.

Hope this answer will help you.