Why is it unsafe to store curd in a copper vessel?
Answer and explanation
Correct answer: Acids in curd can react with copper
Curd contains lactic acid, so it is an acidic food. If it remains in a copper vessel, the acid may react with the metal and form copper salts. Depending on the amount and conditions, such contamination can make the food unsuitable or harmful to consume. Therefore option A is correct. Curd is not acid-free, and copper neither converts it into pure water nor invariably makes food sweet; these statements do not describe a chemical reaction.
Frequently asked questions
What is the correct answer to this question?
Acids in curd can react with copper
Why is this the correct answer?
Curd contains lactic acid, so it is an acidic food. If it remains in a copper vessel, the acid may react with the metal and form copper salts. Depending on the amount and conditions, such contamination can make the food unsuitable or harmful to consume. Therefore option A is correct. Curd is not acid-free, and copper neither converts it into pure water nor invariably makes food sweet; these statements do not describe a chemical reaction.
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.
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