Question -What is observed when a bottle containing cold drink is opened? Give reason. [3 MARKS]
Answer: : Observation : 1Mark Reason : 2Mark Whena bottle containing cold drink isopened, bubbles can be seen coming out with a fizzing sound. Cold drinks contain dissolved CO2 at high pressure. When we open a bottle of cold drink, the dissolved CO2 gushes 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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