Solution:The given statement is true.
Concept- We've looked into how acids and active metals interact to create salt and hydrogen. We are aware that not all compounds or salts produced by these reactions are beneficial and occasionally even hazardous. Chemistry provided us with the knowledge that curd and yoghurt include lactic acid as well as other sour ingredients like citric acid found in lemons, which can result from the interaction of acid with metal. Having said that,
Metal + Acid→Salt + Hydrogen
An organic acid with a COOH group is lactic acid. Because the COOH group is present, the acid is hence weak. Bacterial breakdown causes lactic acid to form in cow milk. Lactic acid doesn't exist in fresh milk. Lactic acid is present in high concentrations in dairy products such yoghurt, cheese, and condensed milk. Acid is what gives certain things their sour flavour. For example, vinegar contains acetic acid, whereas tamarind and grapes have tartaric acid and lemons and oranges include citric acid. Therefore, salt and hydrogen are produced when these acids interact with metals. These types of compounds, which include acids, can react when maintained in copper containers or vessels, producing salt and hydrogen, and the copper will corrode. It may also create toxic substances that might contaminate the food.
Hence, the given statement is true.