Question

On the basis of following features identify the correct group of materials.
1 They are corrosive in nature
II) They have wide industrial applications
III) They have sour taste
IV) They furnish hydrogen or hydronium ions in aqueous.
1) Acids
2) Bases
3) Salts
4) Metals​

Answer 1

1 acids
11 metals
111 bases
1v salts

Answer 2

Acids are compounds that generally release hydrogen ions H+ which result in the acidic conditions.

However, in case of aqueous solution, there is presence of water (H2O) and hence the hydrogen ion combines with water to form hydronium ion H3O+.

H++H2O→H3O+

Hence, the correct answer is option (C).