19. Soda water contains excess ___________ in dissolved state.

H₂

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CO₂

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N₂

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O₂

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Solution

The correct option is B
CO₂

Explanation:
(B) Soda water contains excess CO₂ in dissolved state.
Soda water or carbonated water is water that has been injected under pressure with carbon dioxide gas. Carbonated water has the chemical formula H₂CO₃. It is popularly used as a beverage.
Thus, option (B) is the correct answer.

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