Materials (glass types): The inexpensive, common glass used in windows and bottles is called soda glass. Why is it called “soda” glass? Identify the key sodium-containing ingredient used in its manufacture. Choose the correct option.

Difficulty: Easy

It contains sodium carbonate (“soda”) in its batch
It was first made near Soda Lake
It releases soda when dissolved in water
It contains only sodium silicate without lime

Correct Answer: It contains sodium carbonate (“soda”) in its batch

Explanation:

Concept
Soda–lime glass is made from silica (SiO₂) + sodium carbonate (Na₂CO₃, “soda”) + calcium carbonate (CaCO₃, “lime”). The sodium carbonate lowers the melting point—hence the name “soda glass.”

Final Answer
It contains sodium carbonate (“soda”) in its batch

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