A glass with clear bubbly liquid is on the counter. You're not sure if it's Sprite or water someone has dissolved antacid in it. How could you tell without tasting or smelling the liquid? Explain thoroughly.

Antacid generally contains sodium bicarbonate in it.

sodium bicarbonate is a base

Now if we add ant acid in water there will be small amount of effervescence in the glass of water.

However if we add the same ant acid in sprite then there will be large amount of uncontrolled effervescence in the glass.

so we can easily distinguish the two types of glass content.