Which of the following statements is not true regarding acids?
most fruits contain weak acids.
acids react with bases in neutralization reactions to produce water.
acids can be both highly and mildly corrosive.
active metals will react with acids in double replacement reactions.

Active metals will react with acids in double replacement reactions.

Explanation:

Acids are substances which dissociate in water to give ions.

1. Weak acids are those acids which partially dissociate in water.Most fruits contain weak acids. Lemons contain citric acid, vinegar contains acetic acid.

2. Acids react with bases to form salt and water and are called as neutralization reactions.

3. Concentrated acids containing large amounts of acid are highly corrosive and dilute solutions of acids containing high amounts of water are mildly corrosive.

4. Active metals undergo reaction with acids in single replacement reactions in which metals displace hydrogen from their salt solutions.

explanation: no but i do not usually comment

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.