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प्रश्न
Name the following:
The active component of air which supports combustion and is used up in burning
उत्तर
Oxygen
संबंधित प्रश्न
Tick (√) the most appropriate answer.
Symbiotic bacteria is not present in the nodules of :
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
Explain the importance of nitrogen of the air for plant growth.
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Air is a mixture of many _______.
Inhaled air contains a large amount of carbon-di-oxide.
Carbon dioxide with water changes
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
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.
(i) Bubbles of air came out from the bottle.
(ii) Some water entered the bottle.
(iii) Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
(iv) No bubbles formed, only water entered the bottle.
Which observations is/are correct?
