The least stable anion is

The least stable cation is :

The most stable anion is:

The most stable anion is:

Most stable anion is :

Oxygen is more electronegative than chloride. In the series of oxyacids HOCI, HCIO_(2) , HCIO_(3) and HCIO_(4) , an increasing number of oxygen atom is bonded to the chlorine atom. Chlorine forms a number of oxyacids which differ in their stability order. The least stable oxo-anion among the following is

Oxygen is more electronegative than chloride. In the series of oxyacids HOCI, HCIO_(2) , HCIO_(3) and HCIO_(4) , an increasing number of oxygen atom is bonded to the chlorine atom. Chlorine forms a number of oxyacids which differ in their stability order. The least stable oxo-anion among the following is

The least stable carbonium ion is

The least stable in amongst the following is :