Which among the following is a powerful bleaching and oxidising agent?

Describe the physical and chemical properties of the elements of group $17$.

$A$ quick supply of $Cl_2$ gas may be made by reacting crystals of $KMnO_4$ with a concentrated solution of

The $pK_a$ of oxoacids of chlorine in water follows the order

$A$ greenish-yellow gas reacts with an alkali metal hydroxide to form a halide that is used in the manufacture of safety matches and fireworks. Identify the gas and the halide,respectively.

Which of the given methods cannot produce $Cl_2$?