Why should curd and sour substances not be kept in brass or copper vessels?
Answer and explanation
Correct answer: They may react with metal and form poisonous salts
Curd and many sour foods contain acids, such as lactic acid in curd. These acids can react with copper or with metals present in brass, causing corrosion and producing metal salts. Some such salts may be harmful if they dissolve into food and are consumed. The concern is therefore a chemical reaction and possible contamination, not sweetness, conversion into gold, or transformation into water. Hence option A is correct.
Frequently asked questions
What is the correct answer to this question?
They may react with metal and form poisonous salts
Why is this the correct answer?
Curd and many sour foods contain acids, such as lactic acid in curd. These acids can react with copper or with metals present in brass, causing corrosion and producing metal salts. Some such salts may be harmful if they dissolve into food and are consumed. The concern is therefore a chemical reaction and possible contamination, not sweetness, conversion into gold, or transformation into water. Hence option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
