Understanding Metals and Acids

The video explains why curd should not be stored in copper containers due to the reaction between lactic acid in curd and copper, forming harmful metallic salts. It suggests using tin-coated containers to prevent such reactions, as tin does not react with acids as rapidly as other metals, ensuring food safety.

Why is it advised not to store curd in copper containers?

• Copper containers are not durable.

• Lactic acid in curd reacts with copper to form harmful salts.

• Copper containers are too expensive.

• Copper enhances the taste of curd.

What happens when lactic acid in curd reacts with metals like copper?

• It forms a sweet-tasting compound.

• It causes the curd to spoil faster.

• It creates metallic salts that are harmful.

• It makes the curd more nutritious.

What is the purpose of coating metal containers with tin?

• To make them lighter.

• To stop acids from reacting with the metal.

• To prevent them from rusting.

• To make them look shiny.

Which metal is used to coat containers to prevent reactions with acids?

• Iron

• Aluminum

• Tin

• Zinc

Why does tin not react as rapidly with acids compared to other metals?

• Tin is a non-metal.

• Tin is a noble gas.

• Tin has a protective oxide layer.

• Tin is more reactive than other metals.