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Classification of Matter

Soda water bo...

Question

Soda water bottles are sealed under high pressure. Give reason.

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Solution

Soda water bottles contain Carbon Dioxide, which gives them “fizz" when thebottle is opened. If you don't maintain the pressure, the $C O_{2}$ comes out of solution and escapes to the atmosphere, leaving a “flat" soda

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Give reasons :

(a)Alcohol is mixed with water and is used in car radiators.

(b) Icebergs float on ocean water.

(c) Carbonated drinks are bottled under high pressure.

Explain each of the following observations:

(i) water bottles are kept under water during summer.

(ii) a bottle of liquid ammonia is cooled before opening the seal.

(iii) the size of weather balloon becomes larger and larger as it ascends into higher altitudes.

(iv) tyres of automobiles are inflated to lesser pressure in summer than in winter.

Q. Teacher wanted to open a liquid ammonia bottle in the laboratory. She cooled it before opening the seal. One of the students, Babita asked, is it necessary to cool down amminia bottle before opeinginthe seal. The teacher explained the reason and Babita got satisfied.'
a) What would be the explanation?
b) Why are aerated water bottles kept under water during summer?
c) What values are displayed by Babita?

Q. What happens, when the pressure inside a sealed bottle exceeds the atmospheric pressure?

Q. To make soda-water, a gas called ____ is dissolved in water under pressure.

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