What is observed when a bottle containing cold drink is opened? Give reason. [3 MARKS]

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Solution

Observation : 1 Mark
Reason : 2 Mark

When a bottle containing cold drink is opened, bubbles can be seen coming out with a fizzing sound.

Cold drinks contain dissolved CO₂at high pressure. When we open a bottle of cold drink, the dissolved CO₂gushes out in the form of bubbles with a fizzing sound due sudden decrease in pressure. The fizzing sound is because of sudden release of CO₂.

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