हिंदी
तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ८

Soda bottle bursts sometimes when it is opened during summer. Why?

Advertisements
Advertisements

प्रश्न

Soda bottle bursts sometimes when it is opened during summer. Why?

टिप्पणी लिखिए
Advertisements

उत्तर

  1. In a soda bottle, carbon dioxide gas is dissolved in water under pressure.
  2. The gas in the bottle expands.
  3. Hence, the pressure inside the bottle increases.
  4. Thus the bottle may burst in hot summer.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 11: Air - Exercises [पृष्ठ १२३]

APPEARS IN

सामाचीर कलवी Science [English] Class 8 TN Board
अध्याय 11 Air
Exercises | Q VI. 1. | पृष्ठ १२३

संबंधित प्रश्न

Answer the question put against the following constituents of air :

Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.


Name and briefly explain four ways by which pollution of air caused by humans is minimised.


Write ‘True’ or ‘False’ in front of following statement.

Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.


State a reason why there is a balance in the amount of carbon dioxide in the air, even though carbon dioxide is released into the atmopshere by various processes.


What happens if the percentage of carbon-dioxide increases in the air?


______ is the active component of air.


What is the composition of air?


When air is moving with cool and soothing, it is called a cyclone.


Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.

  1. Bubbles of air came out from the bottle.
  2. Some water entered the bottle.
  3. Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
  4. No bubbles formed, only water entered the bottle.

Which observations is/are correct?


Observe the picture given in figure carefully and answer the following questions.

  1. What is covering the nose and mouth of the police man?
  2. Why is he putting a cover on his nose?
  3. Can you comment on air quality of the place shown in the figure?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×