Question

How do we differentiate between a strong acid and a weak base in terms of ion-formation in aqueous solutions ?

The acid rain can make the survival of aquatic animals difficult. How ?

An aqueous solution turns phenolphthalein solution pink. When another aqueous solution is added to this pink solution, the pink colour disappears. Now when a few drops of the first solution are added to the reaction mixture, the mixture appears pink again. The respective changes in the nature of the solution are from :

Select a pair of natural indicator from the following :