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प्रश्न
“Air is a mixture”. Support this statement citing at least three evidences.
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उत्तर
“Air is a mixture” The following are in evidences which prove that air is a mixture.
- The composition of air varies from place to place and from time to time.
- The components of air retain their individual properties.
- Liquid air has no definite boiling point.
- No energy exchange occurs when the components of air are mixed with each other.
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संबंधित प्रश्न
Complete and balance the following equation
CaO + H2O →
Write fully balanced equation for the following :
Ca(OH)2 + CO2 →
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
State the utility of oxygen for respiration in plants
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Tabulate the various components of air, including the components with variable composition.
Nitrogen is _______ than air.
All living things use oxygen for breathing.
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
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.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
