Question

In solution, rocks are _____.
smashed together
dragged along the river bed
dissolved by salts and acids
smashed into river banks and river beds

Answer 1

Some substances present in the rocks are directly soluble in water. The soluble substances are removed by the continuous action of water and the rock no longer remains solid and form holes, rills or rough surface and ultimately falls into pieces or decomposes. The action is considerably increased when the water is acidified by the dissolution of organic and inorganic acids. (e.g) halites, NaCl
NaCl + H2O -> Na+, Cl- , H2O (dissolved ions with water)
The answer: B