WHICH OF THE FOLLOWING IS TRUE FOR AN ACID?
A. IT PRODUCES EFFERVESCENCE WITH BAKING SODA
B. IT TURNS UNIVERSAL INDICATOR BLUE.
To determine which of the following options is true for an acid, we can look at the properties and characteristics of acids.
Option A: "It produces effervescence with baking soda."
This statement is true for acids. When an acid reacts with baking soda (sodium bicarbonate), it produces carbon dioxide gas, leading to effervescence or fizzing. This is due to the acid-base reaction between the acid and the bicarbonate ion in baking soda.
Option B: "It turns universal indicator blue."
This statement is incorrect. An acid does not turn universal indicator blue. In fact, acids typically cause universal indicator to turn various shades of red or orange, indicating the presence of an acidic solution. Universal indicator is a pH indicator that changes color depending on the pH of the solution. Blue color is usually associated with alkaline or basic solutions, not acids.
Therefore, the correct answer is A. It produces effervescence with baking soda.