Give reasons why a finely divided substance is more effective as an adsorbent.

A catalyst in the finely divided form is most effective because :

Give reasons for the following :A sharp blade is more effective in cutting an object than a blunt blade.

Why are powdered substances more effective adsorbents than their crystalline forms?

Why are medicines more effective in colloidal state ?

You must have seen trainshed copper vessels being cleaned with lemon or tamarind juice. explain why these sour substances are effective in cleaning the vessels.

Give one reason as to why many of the intestinal proteases are secreated in an inactive form.

Give three reasons why air is considered a mixture and not a compound.

Give reasons for the following : PbCl_4 is more covalent than PbCl_2 .